Fixed Time Trial Bikes

^ Seconded.

Isn't it a bit more complicated, when you take the legs into account: sure I read something about closing the gap between the legs being more effective.

I think the round post tested faster than the Mike Burrows 'aero' post on the Team ONCE Giants, but maybe on the TCR not the super-long post on the MCR, and at that level of detail it might not be the same for all riders.