Wow, I've read most of it, and I just have to have to say one thing... Wrong!
Yaoi is not the majority, because most males don't even look at straight porn anymore - just single female porn, and then they mix it together with Yuri, and that takes up 75% of the internet. I have to go through hundreds and thousands of pages just to find a decent male picture. I've found a lot, but I've a lot more female stuff. If anything traditional m/f porn is rare. It goes like this...
1/2 Yaoi (cute guys and emo's)
Yuri (any type - all)
Male and female
Other half of yaoi (burly muscular guys)
Mechs and other fetishes etc, but even most of those are female. No joke.
I like Gundams, and I only ever find females!
You can't begin to imagine how annoying it is for us slightly strange type gays - dealing with all your girl stuff. I even type a male character in and get pictures of girls - non related. Why!?
Probably because they put false tags on the workd to annoy people...