Ya, and? Does he just rank people according to it?
I like the 40, but I'm not going to pretend it's proof of anything. It's just an indicator.
In the case of the 3 cone, there are a couple things to consider.
- It's a skill that you have to practice. When 0.2 seconds out of 7 seconds matters (that's 3% in case you were wondering), small inefficiencies matter.
- For the same reason, it's unreliable. Have you ever checked to see if players reliably run the same 3 cone time before and after the combine? Probably not, and there's probably very little data on it because players just run it once.
- Thirdly, it's actually harder to run the faster you are. If you have the horsepower to run a 4.3 40 and you weigh 225 pounds, that's a ton of momentum ( p = mv ) to change. I can easily see someone err in trying to run too fast, leading them to spend more effort in acceleration and deceleration, instead of coasting and being able to change direction more quickly. Coasting for a 4.3 guy might be just running at a 4.5 pace. So, this reiterates point #1.
I do think there's value in the 3 cone, principally because football does a whole lot more sideways movements than shuttles or 40s, but you have to realize the testing has limitations and weaknesses.