Then there's this photo of Myles Rockwell in the Tuna Canyon downhill race:
Pretty tight lean angle, but crummy body position. The caption says "Rockwell corners like a pro". A pro that can't keep his nose over his stem and doesn't understand that sticking knees out only screws up the bike's handling.
Here's what cornering looks like when done well:
Jobst Brandt descending Haskins Hill, near La Honda, CA. Still the fastest descender I've seen.
Edit: I just finished watching the video. The guy in the yellow jacket looks like he descends all the way on the hoods! What a nut. When I see someone desending on the hoods, I give him lots of room. Nothing says I don't know how to descend quite like hands on the hoods.