How Absurd Is A 40 Yard Dash Time?

Okay, so I hearing all these "draft guys" talking about how Daymeion Hughes is the most polished cornerback in the draft, but, he can't be a 1st round pick because he ran a 4.6 40 yard dash time. My question is, what separates 4.4 from 4.6? The answer is (.2) seconds over 40 yards. Or (.4) seconds over 80 yards. So you're telling me that the best cornerback in the draft can't be the highest picked, or even within the group of the highest picked because over 80 yards, he's less than a half-a-second slower than the faster yet less skilled corner standing next to him? Marques Colston ran a 4.5. He was pretty productive. Anquan Boldin ran a 4.7. He's been pretty productive as well. And there are a ton of fast guys playing Arena ball or sitting on their couch because every year because teams get infatuated with "speed" guys instead of football players. I wouldn't mind one bit if Hughes was the pick in the first for the Saints. Not at all.