I don't think the problem should be that there's gay undertones. I think it's that outside of the live-action realm Robin usually starts off as way below the age of consent. So, thus, I don't like to talk about it from that point of view since I want Batman to be a hero. Though I always imagined the Gotham tabloids would have a field day with that sort of thing.

So what if people think there is gay undertones? That's the beauty of literature. You can make it out to be whatever you want.