Ok, so like I said in another thread (synergy question), I went to 2 boxes. My 4 slaves are running on one machine, quad core, 4g, 4850 ATI. My tank is running on the new box, 2g, and the 2600 ati and dual core leftover from when I built my original rig. Just flew to Dalaran, and almost immediately after landing, I was able to hit /follow and have my toons follow me to the VH gates without stopping every few seconds for them to catch up.