I've fallen on my head with and without using a helmet. Maybe not exact circumstances, but I did notice the difference between cracked skull, blood pouring out, pulled out of the race and being rushed to the ER
versus cracked helmet head intact, dull headache. While I suspect you'll be quick to pick up on the 'not exact circumstances', no two crashes in either your or cyclintom's 'statistics' (the ones we've some to rely on here at least from a humorous standpoint ), questioning helmet use, can do any better.

It's called commonsense for all those naysayers, you two included.

Coupled with my real world experiences, the fact that I have and engineering degree(yep, not just you and tom!) and can do my own research, cycling safety included, also suggests I or anyone else not pay any attention to snake oil pedalling merchants, 'researchers' as they call themselves, with either no first hand experience of the matter, or questionable research at best, or worse, neither.