Just as we went to switch the IPs early this morning there was noticed to be a couple updates needed on the servers, these updates were processed, and then a couple more followed. A few of these updates took an extended period of time to install (asp.net update for asp.net 4). Along with this we decided to AV prescan all the content since it was basically in holding pattern on updates anyway, and these IPs did not switch live to the 2008 servers.
We will switch them very quickly as soon as possible so the content does not go stale however.