OP asked for WoW performance, therefore it makes sense to look into heavily CPU dependant benchmarks. Should make sense even to you.
Intel's single core performance is so far higher than AMDs that two very strong cores beats up 4+ mediocre cores in vast majority of games any day, including WoW. That is the whole essence of why AMD is bad on gaming performance today. They optimize processors for multithreading which is complete waste for today's software.
The fix/patch for windows thread scheduler will only affect multithread performance of Bulldozers big time, single thread performance should be very close to the release numbers.
Also stating that FX-4100 is better based on hypothetical status after some hypothetical patch instead of current status is even more ignorant. Or wishful thinking. Or whatever. It's not complete disaster, i3-2100 is just better in gaming, plain and simple.