The same half is also made up of racists and anglophiles who are used to the bitchiness of American/European women. So when they see Sheryl they're like "Whoa, this is the type of women I'm used to. I'll be rooting for her."
The Japanese moe concept that Ranka embodies is, for these silly white slobs, extremely foreign. Not sure what they're doing on /a/ though. Maybe too busy trolling and fapping to lolis.