I think maybe you were joking, since you really know nothing about the server we are running on.
There is a competing product's support forum I check out occasionally that can take several minutes to load each page...5-6 minutes per page if their user number is up.
CPU load has been a good bit lower overall, tho it is difficult for me to give you facts right now, since traffic is not all that heavy on the weekends, but for the last hour cpu load has been between 0% and 5%. I can tell you that our hard drive usage went from 298mb to 133mb (I had pruned several thousand posts to get it to the 298mb level before upgrading to v6). I'll try to have more concrete results later when traffic is back up.