Let me explain to you why your argument doesn't work, because I'd like to help you figure this one out and you seem to be struggling a little:
By your logic a single-core 1 GHz Atom CPU isn't a game bottleneck.
Why?
Because I can list games it plays quickly: the original Quake, Duke Nukem 3D, and some brand new flash games.
By your logic, all games that don't work quickly on a 1 GHz Atom processor are 'poorly optimized', so they don't count.
Actually, by your logic, every CPU ever made isn't a game bottleneck...