The way it is right now is fine with me. 15 might be helpful for people on slower connections who have sigs enabled, though. But I'm fine with whatever.
Oh, really? Well it will bother YOU ALL at some point, and then you'd regret not supporting the proposition 1.1 - Lower the pages per thread to 15. You WILL regret it.
I think 15 is enough, like Conan said. I mean, think of possible future photo-threads. Not everybody is as patient as to wait an hour for all the pictures to load, if you know what I mean