Since this forum is provided to you for free you should really appreciate and not giving complaints, if you really want this forum to load fast then you should try donating.
DP does tent to lag a little bit at times, But so do a lot of forums. And you have to bear in mind the sheer volume of traffic that DP has. I mean its huge there is always tons of people online and once (members) and always thousands of guests. In my opinion it could be a lot worse than it is. It may lag a little but its nothing too bad, just a couple of seconds here and there.