Without actually data, who is to say one helmet is better than the others? If you are choosing between two helmets that both have a snell sticker, thats great, they both meet that standard. However, it won't tell you which will protect your head better. I haven't seen the article mentioned, but it sounds like they ran some tests on the helmets. Until the manufacturers release data regarding impact absorbtion, articles (assuming it has measured data) such as this are the only real measurement of safety.
-Drew
-Drew