It's almost as slow as the old site from here. It downloads a few K of each page then goes to sleep for several seconds, and that's without adverts and users to slow it down further
I'm still a little puzzled. This is a dual opteron 244 server with acres of memory etc. When we ran tests, even with 200 users making 2000 requests, it still managed to process them at around 20 per second.
There are a few tweaks we can do to the DB and possibly the code, but I'm expecting no more than a 10-15% increase in speed.