kblahetka
Supercharged
Well actually, those tests have been done already, and the one article posted even stated that there was one cheap Z something helmet that out performed most. That doesn't mean that cheaper helmets out perform more expensive ones, it means that out of the helmets tested the cheaper helmets held their own with the expensive helmets.
The reality is you do get what you pay for but not those things aren't just about safety. A $400 helmet will be more comfortable, better ventilated, and have better materials that contact your skin. Those contact and wear points will out last their cheaper counterparts. And those items are worth a premium especially if the helmet you own is uncomfortable to the point that you don't want to wear it.
Bottom line is, what you hear about in reports of accidents is for the most part unscientific. None of us have been riding around with impact sensors attached to our heads. If you crashed and you walked away, your gear did it's job. If you wear your gear everyday without discomfort or thought it's doing more than its job.