I am trialing webchat at the moment so I also have Analytics Real Time overview open and it is quite an eye opener. I had thought our site was fairly busy, for a niche b2b site that is, but what that translates to when looking at Analytics Real Time overview is much time of absolutely no activity followed by a page here or there, then half an hour of nothing, then a flurry of 3 pages then more absolute nothing .....
It really is an eye opener. I suppose I shouldn't have expected anything different after all it only takes a moment to request a page from a server and those moments could be spread thinly ..