I have had epics drop from destructibles, chests, normal mobs, rare/unique mobs, and bosses. My loot goblin has only dropped rares so far. I have gotten somewhere in the 30's in total legendaries dropped to include recipes.
The amount of time played has been going from paragon 8 to 51. I solo run with my Wizard on Torment 2, it is the most efficient method for me in the amount of time it takes to kill for the xp and mf/gf bonus. I have also Torment 1 on my DH and Barb with also good results. I have not ventured past Act 3, and most of my runs have been strictly Act 1 as I find a lot of legendaries seem to drop there, as opposed to Act 2 (that may strictly be RNG though). I have no complaints about the xp or the drop rate considering how much of a grind v1 before major gameplay patch changes were getting past Inferno, and the complete lack of legendary drops I got for leveling up 3 60s past Inferno and one 53 which netted me exactly 3 dropped legendaries. All my other legendary gear has been gotten by grinding for gold. This patch has really changed the game a lot of terms of enjoyability. Not a whole lot to complain about for me.
I just wish this had been Diablo 3 from launch, I will never understand game devs stubbornness to venture to a completely different formula when Diablo 2 was so revered.