Slow loading times could possibly stem from several bottlenecks along the way between your ISP and our server. I am not experiencing any myself, and I know that many others aren't either. We are using a brand new fast server and the lasest version of Vbulletin, so I suspect that any issues with slow loading times might be down to various ISP's and their connection to this server.
I will say I have had issues with loading time with a certain ISP I was using a couple of years ago. They were with this site, and not so much with others. At first they tried to shake me off, saying it must be the site I am trying (and kept telling me to test against CNN.com, which was loading just fine). Finally, Scott helped me ping the site and followed the route between this site and my ISP and figured there were problems in the connection. They wouldn't do anything to fix it, so I switched ISP's and the problem was thus solved.