Sorry man, WoW is a bad example to pick and some other MMORPGs are similar in that regard. WoW is poorly optimized when it comes to number of threads, but it it's heavy cpu bound and will see great improvements using an i5 3570k OC'd over a pentium or anything with considerably lower IPC.
All games are poorly optimized, that's the point. Software and games are far, far, far behind hardware, you aren't going to see games take full advantage of the 8350 or i7 or even i5. It will definitely see great improvements with the i5 over the pentium, I never made a point to say that the pentium was amazing or anything.
You are actually wrong.
BF3 aftermath 64 players (heavy cpu load):
i7-3770k -> http://www.youtube.com/watch?v=ch0mR4Evu8I
Check the frequencies. FX has hit its thermal limit and functions at 4Ghz on all cores-won't turbo at all. Ivy is quite thermally comfortable at that cpu load and takes advantage of the superb intel turbo and functions at 3.7 Ghz. The FX on one core will do 4.2Ghz at best, i7 will do 3.9k. Their frequency delta while gaming is smaller than you think. The effective 20% gaming o/c for the FX will be 4.8, for 3770k you are looking at something like 4.45Ghz.
2 different systems is not a comparison or benchmark, and I've already said that bf3 might be one of the few instances where FX has a leg to stand on vs Intel. And counting CPU load across all cores is useless, you need to count the load on the most used core as these games are not heavily multi-threaded, and IPC is what is most important (or really, GPU is what is most important).
Well then, find a Ph II that will match me when I'm running at 5.2Ghz, because that's my cap. On "just" water cooling no less. I also have a 970BE that runs at 4.3Ghz. My FX chip is faster, even at "only" 4.8, which is a standard OC for PD.
So how much experience do you have with Ph II and FX again? Because I run them both max-clocked side by side in the same room, both on 990FXA-UD3s.
And? That's a pretty terrible value to pay $100 more for your FX chip over a Phenom II and $40+ for an AM3+ motherboard just for basically an increased overclock when it comes to gaming and single-threaded, general usage applications.