I am not encountering any difficulty here. When you experience the delays, what does it show at the bottom of the page in the "Generated in ___ seconds in which ___ seconds were spent on a total of ___ queries"? Right now, I'm seeing extremely short load times and very fast generation times; the page I'm looking at now says "Generated in 0.045 seconds in which 0.012 seconds were spent on a total of 9 queries," which is very fast indeed.
