I think there are as many different types of bisexuality as there are bisexual people.
Personally I'm potentially attracted to all types of female bodies (skinny, slim, athletic, chubby, fat, short, tall, curvy, flat...) and I find some forms of ugliness strongly attractive so probably more than 30% but when it comes to men I'm only attracted to a certain type of male bodies, so much less than 15%, maybe 5%.
I don't consider myself bisexual because I can only have a relationship with a woman, all the same-sex relations I've had were purely sexual.
Regarding the initial topic question, after checking lots of profiles on OKC for women who answered the question "Would you date someone who is bisexual", very few straight women answer "yes" and to the question "Would you consider being in a relationship with someone who has had homosexual sex?", it's almost invariably "No".
So it could be that it's not so much that bisexual women are more attracted to bisexual men, just that they are not repelled by them the way most straight women seem to be on that dating app. Not sure how users of that app are representative of society at large.