Tony, proof has been provided in previous threads. I posted some links below, but you will have to do the reading.
Okay, I read your links. I saw a lot of pantie-wetting hysterics about how getting run over by a motor vehicle might actually hurt a pedestrian (And wasn't that a surprise...) but no actual facts that would relate to this issue.
You claim that the U.S. bumper would not clear EU legislation. Right? My question is simply: why not? What specific points in that legislation would cause trouble? Lack of crumble space? External measurements - if so, which ones? I ask this question because I
live within the EU and see new vehicles without such fat front bumpers daily. For example, this is what a new Kia Sportage looks like:
A Toyota Land Cruiser:
A North-American Patriot:
Compare to a Euro-Patriot:
See what I mean now? The only difference in the Euro-Patriot appears to be that the front bumper is lower - but Kia, Toyota and a whole bunch of other manufacturers seem to be able to sell vehicles without such a dirt-hugging front bumper.