When it comes to benchmarking, you're not really going to see the same % performance increase while gaming. There are people which monitor FPS 24/7, but if you don't, I seriously doubt your experience is going to be any worse.
http://www.3dmark.com/3dm/11301970. just got a score over 10,000 had to overclock the 4690k from 3.5 to 4GHz. However I'm not sure if my idle and load temps are healthy? my idle is 45-50 and my load temp is 65-75 (load being firestrike).