We have a customer who was running sbs 2003 server with win xp boxes. We replaced the server as exchange was getting slower and slower and more ram could not be put in this server due to a limitation with this version of sbs.
We put in a new box with sbs 2011.
After all said and done, two of the client users swear upon their grave that the office 2007 load and save progress bar was not there at thier workstation when the old server was there.
At first we believed, but now after seeing the progress bar everywhere office 2007 and 2010 is, including with our own stinky old 2003 sbs server install, we are now having our doubts.
Frankly we have not even given a it a second thought in our daily operations nor have our other clients at different locations as we all have work to do.