I tested around 10+ i7 and like 5 i5. Not so many as we have very few OEM.
What we are seeing from these benches is about 2% single threaded improvement over X99. This is at most. When I tested with 970 it was less than 1fps. But X99 crushes on multi threaded games, physics based games and all rendering multi threaded tasks for similar money.
hum guess I go look for x99 or wait for Zen then.
no rush to upgrade from my 4670k set up yet.