Improved exchange email?!?

After the 2.2 firmware update, I have noticed a marked improvement in how my exchange server email works with my iPhone. Particularly, sending mail and photos no longer causes email to hang. Unfortunately, our IT people updated our exchange server at about the same as I updated my iPhone firmware; so I can't tell if the improvements were caused by 2.2, the exchange patches, or I'm just imagining things.

Has anyone else noticed any change in their exchange email service?