I have no idea what "Beyer Dynamics" is either.
I'd also add that (and I know this is massively offtopic) - who cares what "the average person" thinks about, knows, etc? On average I would say I meet a few thousand people a year, and I've yet to meet this guy "Joe Average" in all of my travels. Sure, my sample size is only around 100k, so maybe it's skewed, but still. I guess there's a reason youth is for the young, and all that.
Anyways, your friend probably won't be ill-served by these if he/she wants them, but make sure they triple-check that L/R is wired in properly, out of the box (and the headphones themselves are not symmetric front-to-back, so you can't just ignore the L/R silk and flip them). And I think it should be safe to assume they will be happier with something they want, than something they're told to want. *shrug*