It's decent. Just because you overclocked it doesn't mean it's THAT great. I would rather have a stock Core 2 Duo E4300 than a Athlon X2 3600+ overlocked to 2.7Ghz. It's all in the architecture.
Right now my 3800+ is decent, nothing that blows you out of the water, but it is smoother than a single-core when playing CoH.