I think the current setting is at "10 replies or 10 views" for a thread to go from normal to "hot". I think it's safe to assume 99.99% of the threads here reach that in a matter of minutes, or at the most hours. Just my opinion of course, but it kind of takes away from the whole idea. I think increasing the requirements a tad would help users see what the really hot threads are.
Just something I noticed and something I'd throw out there.