Yeah, sometimes it is slow, other times lighting quick. I know it isn't my computers, as I use two of them and about the same time at night it dies on both of them. Only around 3am to 4am for me though.
I assume goob hosts this site from a home-based server. Does anyone know who his ISP is? It sounds like a common problem with a cable internet connection.
When ever I have this slow problem, My xbox live lags also. I fix the problem by unplugging my internet box, and router and plug em back in. Then everything works like new.