Aerodynamics / Aerodynamic Cost / Aero parts

I may have misinterpreted things, but what I took from that article is that at a given speed the smaller your frontal area and the lower your CdA the lower the power required for a given speed.

i.e. on a standard road bike you need to output 280 watts to maintain 40km/h.

On a full TT bike with sperm-hat on then that figure drops to 210 watts at 40km/h.

If you can put out 280 watts then the top speed which you can maintain therefore rises in line with the falling CdA.

You could be a yoga teacher capable of Prince like self pleasuring, but if you've only got standard road drops you are not going to be able to get as low and long as you would with TT extensions on a TT bike, I submit.

Of course, nobody is going to disagree with that. Except some people's "low" isn't that low, even on TT bars.
They are merely a tool for which you can achieve a more aero position, not a magic wand. Most amateur riders have a pretty poor aero pos, on TT bars OR drops, they're not getting full benefit of the TT bars, especially if the position they get in causes discomfort or restriction resulting in a REDUCED power output.