I mean, did you read the article? it actually trying to say something different. It is saying that DOT only helmets may be better at absorbing impact energy that goes to your brain than Snell approved helmets. It is basically saying that Snell is concentrating on super performance helmet, while you would be brain damaged/dead by the time the helmet is trying to save itself, where as the DOT helmets are better at saving your life.

You should read it and see what you guys think.