I wouldn't run 23's to commute... wish I could cause they'd probably be fast as hell but I figure I'd be getting constant flats and would probably destroy my wheels also. I run 28's and I've gotten two flats in about eight months of commuting on the Coda Sport. no flats at all in three months of regular commutes on the MTB (I used to get pinch flats on it all the time before that but that was back before I starting keeping the tires pumped up).

what I do have problems with though is constantly detruing wheels