I'm male. I'm even American. I don't think anyone including my biological brother has ever called me "bro" in my entire life. Maybe because I'm 38 and not 22?
When I see something being pitched/marketed/whatever using the word "bro", I have never imagined it could be targeted at me.
Just now I figured I'd visit the site before commenting, and I mistyped the domain (the .com is the FB profile for some frat-related group). Oops; so I googled "bro pages".
The FIRST HIT is something about the playboy mansion. Nice.
I'd be vaguely annoyed if someone standing near me noticed that tab ("bro: just get to the point!") open on my browser, so unless there's a roaring wave of approval and it's suddenly better than regular man pages (which aren't bad; I skim fast) plus StackOverflow, I'm not using it.
Eh, with a little luck they'll change it and try again. The idea seems solid.