I had a different experience. I was using hotmail over Nokia Messaging for a long time. Recently I started getting a password prompt every time Nokia Messaging tries to sync the email (hotmail is my primary account for NM). I reported a bug for that issue.

https://bugs.maemo.org/show_bug.cgi?id=10566


Now I dropped the Nokia Messaging account and setup a new POP3 account for hotmail. I have not noticed the delay, but I am just glad the sync is working.