To really muddy the waters, consider that pros don't ride the bikes any of us ride which would lead me to believe they don't ride the wheels we ride, either. When you have to add weight to your bike to get it up to the UCI lower weight limit, there's something special about your bike that I can't get at my LBS. When a team like Trek / Seaafredo literally has a trailer full of Bontrager XXX race wheels for it's team, which are made with hand-laid carbon in Waterloo WI even when sold commercially, I'm willing to bet that balancing may be part of the equation before the team mechanic ever sees the wheels. (The wheel part is purely speculation on my part, but I do know that top racers don't ride the same bikes we do.)