I would suggest they mean to say front-facing surface area, which this bikes would indeed achieve over a standard design bicycle. One post in front of another w

I would suggest they mean to say front-facing surface area, which this bikes would indeed achieve over a standard design bicycle. One post in front of another will likely have a bigger impact on aero than a single deeper post. Could be phrased for better clarity I guess, but in an aerodynamic mindset, I think it's sufficient.