I think it's more interesting to figure out if there is anybody at all who lives up to the normal "image". I've had a pretty active sex-life in my not so short life, and either I've been just plain lucky, or all women/people are really into BDSM. D/s is the norm. It's how we are wired. We may not all use the BDSM lingo, but sex with no element of domination I don't think anybody would like. Not really.
Sure there are a lot of people that are too scared to live out there fantasies. But that doesn't make them less into BDSM. Just less into life in general, not more normal.
Isn't that so?