Quote from drvic10k
random loot is random
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.