Oh, and the tooltip also doesn't account for passives, at least not for barb's weapon master.
I seem to remember it did for Sharpshooter. Wear gloves with no DPS stats, wait for sharpshooter to stack to 100% crit, then hover over gloves with only critical chance. It should show no DPS gain. I had to remove sharpshooter in order to get accurate comparisons of gear.
Not seeing where the TT is going wrong here. Of course, it's been a long day for me too... Increase in both main stat and speed along with an increase in raw weapon DPS. Now, if I would have shown the difference the TT was giving me when I went from my Skorn to my EF and Source, yeah, that was saying I would lose 44k DPS when infact I gained about 25k.
edit: Got it, see it now. As I said, long day. lol