I'm seeing 15-20% increases in 144,5 hash rates with my farm of 1060's.  Moving on to the bigger metal now.

1070's - now getting average of 42 sol/s with v0.5 and an OC like this: 75% PL, +122 Core, +255 Mem

1080's - now getting average of 47-48 sol/s with v0.5 and OC like this: 70% PL, +97 Core, +401 Mem

For the 1080's, I'm seeing about a 16% gain over 0.4, with the same exact overclock and all, apples to apples, from the v0.4 days.  WOW!  Thank you sir!

UPDATE: 1080ti - just received this card, getting 70-71 sol/s with slight overclock 97/282 and 95% PL.  FUN FUN FUN!