When I saw the title, I wondered if this would have something to do with the strange "anatomy" of Ken dolls. They sure confused the heck out of me when I was a little girl, with no brothers as a basis for comparison.
This survey question is pretty whacked, but I think most little girls who see it would laugh, think "wow that's weird!" and dismiss it.
It wouldn't suprise me if they came out with "anatomically correct" Barbie and Ken dolls.