My first char was my monk, leveled to 60, farmed act 1 some weeks together with a friend's DH. None of us did see a legendary drop. My friend then got bored of act 1, and continued to act 2/3 tyrael farming with his DH. Then he found one green item.
I also wanted to do that, so I leveled a DH myself, and found two (crappy ofc) legendary items with lvl 59 in hell. I then started to Tyrael farm myself, and I found some nice rares (although never the "one in a million" piece).
I had so many strenght and int items, so I decided to level my barb and my wizzard. None of them got a legendary while leveling, and I actually never played them "endgame", simply because my main's gear still was ways better (which makes alts pretty pointless right now, but that's another issue).
With 1.03, I returned to my monk, and farmed act2 and 3. In the last week, I found two good legendarys.
So to sum it up, RNG is just RNG. But since the droprates are so ridiculously low, you can go ages without finding a legendary or a good rare. I was quite unlucky at my first tyrael farm runs, I almost stopped playing the game. But then I found some nice items which netted some gold, and so I continued.
The current loot drop rates are buffed for Act 1 & 2, but nerfed for Act 3 & 4. I don't care what Blizzard says about that, its true. As soon as 1.0.3 hit, we seen the obvious but Blizzard acted like they didn't know about it. I'm really fucking sick and tired of Blizzard at this point and as much as the game is enjoyable for leveling, its seriously dull and boring once you beat inferno and start farming for better gear when 99% of it is garbage.
The auction house prices are so screwed up right now that you can't sell anything that is worth something. Sources for one thing are something that is unsellable because people don't look past 200k in auction buyouts. When you get a chance, look at Ceremonial Knives for WD.... you have 800 dps 1h selling for 75,000-4,000,000.
On the other hand lets consider a bit diffrent mechanism for a sec. What if you were unlucky and you got no legendary at all untill lvl 60. Probably there is a pattern that makes you get more loot at lvl 60 if you didn't get any. To sustain your motivation to play the game. Such thing will be verry beneficial to Blizzard if it was true.
What I'm trying to prove is not a fact, it is just something to consider. There are many people who have totaly diffrent experience from mine, and yet still, there is plenty of people who have the verry same drop rate in time as I did.
If you have access to any research on the matter of loot over time analysys, I'd be happy to see that.
Dude really? You think blizzard is watching the drop rate of legendaries for every account, and zomg if they didn't get any while leveling they stealth into your acc and raise your drop rates? Conspiracy theory indeed.
Tbh, it would be nice if that system was in game, a bit similar to how Sharpshooter from DH works, just working off elites you kill, it would help offset those that never saw a single orange/set. Although, I'm at... 20 legendaries atm so far, and only valuables were 2 Dex andys (both post 1.03, le sigh), mildish-high dex Diggers and Immortal King belt, rest is mainly salvage fodder/charsi food.
I've got 180 hours played and i've found 4 oranges and a green. OFC i'd love for all drop rates to be increased to so i can see rainbows everywhere, but as it is now it doesn't seem terrible. or i've just been lucky as shit.
my M Fon all my characters isn't above 20 tbh, i mostly run GF for now.
as already said, you're using a way to small sample to "deduce" way to specific hypothesis.
Also, the human brain in general is exceptionally good at finding patterns, even when there are none (and even more so when you add the influence of "selective memory"). Basically that mean that no matter how long you look at a totally random sequence, you'll always see a pattern emerge (that pattern might be quite ridiculous after a while, but you will still "see" it). What this mean is that if you ask 20k pple what they looted and how, you will see a pattern. I'll probably find one to if I ask another 20k pple. If will most probably be a different pattern, but maybe we'll be able to come up with a completely stupid pattern by combining our result (it's a stupid one, but still better than nothing, right ?).
Basically if you think blizz tinkered with loots in some way, try to look only for that specific pattern, compute what the average and standart deviation is, ask 200people (1k would be best, but no need for more), and look if the result you had correspond or not to what is expected. If you randomly ask 20k people about their loot, you'll probably notice a pattern, but it will be meaningless and you wont be able to prove/disprove it by saying "look at the 20k pple I used to build that pattern", you should do the test _after_ setting the hypothesis.
edit : also look at the "Significant" panel of xkcd (882, can't link it), for some kind of intuition behind what I just said