No, the independent testing of helmets for protecting your head has shown that there are ones that protect well and those that don't protect as well at all the different price levels.

Regardless, I'll believe that between all of them whether rated good or bad, they protected well enough. So get what you want. Or look up what some of the better rated helmets are and choose from them. Though the independent testing is a little behind and won't have some of the newer models included in their most recent tests.