BFG uses an example where a GPU-limited game shows no gains/losses if you adjust the CPU overclock. Just think about how hilarious that statement is for a second - we _already_ know this.
Yes, we might already know this, but its not obvious that it also applies to the vast majority of cases out there. In fact, Ive seen cases where people had something like an E8600 + GTX260 and were being told to upgrade to an i7 to get better Crysis performance. LOL.
As it stands now, we have people with decent dual-core setups absolutely terrified of upgrading to a decent graphics card because theyre told theyll be CPU limited, and are instead directed to CPU/platform upgrades, as if these will somehow remove their overwhelming GPU bottleneck.
Likewise, we have links to doomsday style graphs demonstrating games being seemingly unplayable unless you have an i7 overclocked to 4 GHz.
Actual gaming is practically never like that, yet we have the fringe cases being portrayed as the norm, and the importance of the CPU being constantly overstated.
Id rather have an E6850 @ stock + GTX480 than an i7 @ 4 GHz + GTX260 any day. The former will game far better overall than the latter.