Of course someone like Van Hummel could beat Greipel, given that Greipel positions himself like he usually does
I didn't say it was completely irrelevant, just that your
"sprinting form" is more consistent than anything else. I'm a bit of a sprinter myself (at a very low level!

) and find that my sprint is always on around the same level whilst my climbing can go from utterly horrible to, well, half-decent.
Cavendish for example can win any sprint with quite bad form but he can't get over a small hill unless he's in top shape.