Just switched to XF from VB. So far things seem to be quicker than they were on VB but not as fast as some other XF forums I've visited. My server was configured to best suit vBulletin so I expect I'll have to make some changes. Also, I've noticed some lag when typing in the editor. It seems to only happen when you're replying to a thread with a lot of replies (I have it set to display 30 messages/page). When replying to a thread say with only 1 or 2 message there doesn't seem to be any lag, and same thing when sending a PC. I'll be happy to provide any info about my server configuration, just let me know what you need. Thanks!