Honestly? I don't think so. However, it certainly feels faster than the stock exhaust, but that's probably just because I can actually hear the engine accelerating which gives the sense of speed.
Like shiftblake said, it sounds amazing now and I'm always itching to go out for a ride! Managed a few hours yesterday before the wind and rain came. Fingers crossed for next weekend. Can't wait for the weather to get better so I can start commuting to work again (being a new car owner has made me a bit of a wimp!)