There's plenty of reviews that showed bigger gains for Skylake than what we saw in AnandTech's review. Instead of telling people to 'wake up' you should be looking at more than a single piece of data.
- Eurogamer:
Core i5 6600K vs Core i5 4690K (same 3.5-3.9GHz base/turbo)
- 17% faster @ The Witcher 3
- 11% faster @ GTA V
- 10% faster @ Battlefield 4
- Hardware.fr
- PCLab
Core i5 6600K vs Core i5 4690K at fixed 4.5GHz, Skylake-S is:
16.2% faster @ Battlefield 4 MP
10.9% faster @ Counter Strife Global Offensive
6% faster @ Crysis 3
22.7% faster @ Far Cry 4
13% faster @ GTA V
12.5% faster @ The Witcher 3
9.2% faster @ Watch Dogs
14.7% faster @ Project Cars
14.8% faster @ Starcraft 2
24.5% faster @ Total War Attila
Also AnandTech's results didn't match those of any other website: