According to this article, nobody climbs fast enough for clothes to make a difference in speed (wind resistance), so you can indeed save the money you would have spent on racer's attire:
Secrets to Cycling Faster Up Hills - Be Self Propelled

According to the Map My Ride app, I currently climb at 3mph on a 7% grade hill. According to this thread, the elite racers can climb at 14 mph on 7.7% average grade inclines! I think a 10 mph improvement in your climbing speed will make a huge difference in your commute time.

http://www.bikeforums.net/profession...ing-speed.html