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Cervelo calculate that elite riders would need to be climbing >8% for the 200g penalty of an S3 frame to be a problem compared with the less aero R3, and frames make much less difference than wheels.

Very interesting. I wonder if stiffness was also a small factor?

Re: aero frames. What is the point of making the seat-tube + seatpost super aero. When the rest of the frame pays little attention to aerodynamics. My Racemaaster, has a tear-drop seat tube + seatpost, and even a rear wheel cut-out. Yet the head tube and down tube have the aero dynamic properties of a sack of potatoes. Is this faux-aero design feature purely to make the bike look fast? (I'm OK with that TBH)