Sorry to hear about the problems you're having guys. I'm a bit puzzled by it simply because I've spent the better part of 2 months optimizing the site and server to run faster and faster. So I am a bit perplexed.
I can tell you one thing: it has nothing to do with how many members we have on at any given time, nor the volume of pages (or BS lol!). Since it's intermittent, it makes the problem very difficult to solve. That said, I'm beginning to wonder if there's an issue at my host provider instead of the site or server, since I've done everything I can to make those faster.
I'll keep looking into this and see if my host provider has any answers.
Glenn