I find that benchmarks do not live up to actual gaming, and in that department an AMD processor tends to preform equal to the next generation up from the equivilant Intell processor. I also find that alot of benchmarking software cators to intell design.
Intell tends to win on anything that uses small ammounts of data at a fast pace. ( racing games, alot of graphic editing software, multimedia, cracking software, etc. )
AMD tends to beat out intell on anything that uses large chunks of data at any pace. ( MMORPGs and most RPGS, dealing with raw video and audio files, working out complex mathmatic formulas, etc. )
All of that said- most likely the average user will not notice a difference between comparable processors regardless because they do not push them to thier breaking points which is where the real differences start to show up.