One of the reasons I've read that thinner tires work better is they support higher a PSI. However, at the same PSI wider tires do have less RR. I was just curious if this smaller tire would create that big a difference in speed, though for not it really doesn't matter as I can easily keep up with my friends, was wondering more for if i wanted to go on a group ride with the LBS and found I was too slow or just for solo rides.

I'll probably keep my 700x35 tires and consider buying the 700x28 when these wear out