When I switched to a set of Rolf Vector Pros in 2001, I noticed a .75mph average increase in my speed over my Mavic Open Pro wheels - or so said my cyclometer. So aero does count and this was not under race or timed conditions, just me riding the same route and looking at what the speedo average said. It was early evening so no wind was involved. This was consistent for nearly every ride with them. As for light weight, my 1200 gram wheels sure feel like they getup go (****n' git) faster than my 1800 gram wheels do. And climbing is where the clearly noticeable. Should you spend bigger bucks for a set of wheels that get up to speed faster? I don't know, it depends on what the speed is and what you determine to be faster is. Should you spend more money for aero wheels? They do make a difference. For climbing wheels? They do make a difference. But also as was posted, none of this will over come less fitness on the part of the rider of said bike. They will help.

SO, does any one wish to debate aero seat posts or handle bars