Interesting article. Also interesting that the Arai RX-7, Shoei RF-1000 and Suomy Spec 1R Extremes are 3 star (out of 5) helmets in their tests.
Here's the link to webbikeworld's report and links.
http://www.webbikeworld.com/motorcycle-helmets/sharp-helmet-rating-system.htm
Here's the link to the British DOT site
http://sharp.direct.gov.uk/
I agree with the review on web bike world. I've had a lot of diffferent helmets, and my shark rsr2 hands down is the most amazing helmet i've ever owned. Quiet, comfortable, the shield is so thick and it seals up tight. Won't ever blow off again as it locks in place if you want to do that. If you've got the $$ buy one...you won't regret it! You can often find new ones for a great price on flea-bay if you really look. I got mine for under $200 (yes, under $200 brand new!) and i'd pay full price for another if I had to. It's that good!
Here's another review on helmets (more dated)
http://www.ridetriangles.com/pdf/643/221609.pdf
Here's a good review by one of the large motorcycle magazine.
http://www.motorcyclistonline.com/gearbox/motorcycle_helmet_review/index.html
I got my Shark on clearance for $79 :D
Best helmet EVAR! I don't know why they get a bad rap in some reviews. . .
Shark RSI
Arai Quantum f
Shoei TZ II
Shark is what I ride with.