Right, I've had a mess around with boost mode for a few hours running games I've got that I know can be problematic. Non of this is science, just guess work!!!
Project Cars - Better, much better. Still frame rate issues in wet racing with lots on screen but its considerably better than before.
Bioshock Infinite - Pretty much a solid locked 60fps from the part I played. Could be different in other areas though maybe.
Darksiders 2 - Now locked 30FPS and screen tearing is gone
Lords Of The Fallen - Almost now a locked 30fps, screen tearing pretty much gone.
Tomb Raider - Now a pretty much solid 60FPS lock (not ROTTR here, the original reboot)
Sleeping Dogs - Still a bit rough when driving around, but much better and smoother on foot.
Evil Within - Great! Miles better than before!
COD Ghosts - Yes I know no one plays this anymore, but in multiplayer areas, game is now pretty much locked to 60FPS where it wasn't before on some maps. First 10 minutes of campaign mode is also pretty much a lock.
Dead Island - Seems the same as before, Frame pacing issues and not FPS problems perhaps?
Everybodys Gone To The Rapture - Smoother, still not perfect, but must now be a very close 30FPS lock
Oddworld New And Tasty - Now seemingly locked to 30FPS
Resident Evil 5 - No more frame drops that I can see where there used to be minor ones throughout.
I'll submit more if anyone is interested