But...(hey, someone has to be the damper on the buy-party ), buy it if the price is right and you get a good deal. Don't buy it for the speed. My gut says the bike shop is exaggerating. Depending upon the hybrid, if you're running narrower tires and smooth tread, your speed improvements won't be that dramatic. Yes, it will be faster; yes, you'll be more comfortable for the long haul; but in the end, it all depends upon the engine. I saw about 1-1.5mph switching from my hybrid.

That said, of course, by someone who is always planning her next bike purchase It is an addiction.