Drag of the wheels
Wind resistance, I still don't buy 29ers being any good for downhill. How come intense ditched the 29 inch version of the 951 after testing it and went to 650b instead?
Pedaling right to the lip of jumps? Have you ever even raced DH before? You don't pedal right to the lip of jumps because it throws you off line even with a BB a bit more below the axles of the wheel that isn't going to change....believe me I've tried some bikes with really slammed bottom brackets. Besides that with many jumps you have to lay off the speed a bit or squash them so you don't overcook the jump.
What are you on about....no point in winning on bikes they don't manufacture? Yes there is, for development purposes and brand image. Teams start using new bikes way before the general public get their hands on them so that they can test and develop their products. As I said earlier, companies would push 29ers in DH if they thought it would give them a winning advantage.....people would then buy them.
It's really obvious how little you know about the DH race scene man. I'm guessing your an XC jockey who bought into the 29 hype.