Outlook 2007 seems less 'chatty' than Outlook 2003 with RPC over HTTP

This might be a fluke but overall, the 'ping times' and amount of overall connections made and broken over the link seems to be much less compared to Outlook 2003. This is with Exchange 2003 SP2 as the server, so whatever changes have happened, seem to be backwards compatible. I suspect they are taking advantage of keep-alive connections more than before but without doing a full network trace, I can't be sure.

This is just an armchair observation over a mobile phone data connection back to the server. Not entirely scientific. It does look like there are a few more fields that show up when you do 'Outlook /rpcdiag' also.