Is Batman a Superhero?

In case you haven't heard, Batman: Arkham Asylum won a Guinness World Record for "Most Hyped Superhero Game" (the validity of this is in question--personally I think it's a little too much of a marketing ploy). But there's also a large outcry because apparently a large segment of the population doesn't consider Batman a superhero.

I think this is unfair. Sure, he doesn't have any "super powers" in the strictest sense. But aren't Olympic athletes considered extraordinary and of higher ability than 98% percent of the population? And also, the sheer amount of willpower and lack of self-preservation have to count for something.

Sure, he isn't bulletproof. But Bruce (since he's in the Arkham video game, I'm using him in the discussion) could walk into a room full of the most powerful beings in the known universe and stop all conversation by clearing his throat. Superman can't say that. For all his sixty different kinds of vision, he doesn't command that kind of attention.

That's what makes a superhero.