I rolled back to NoDo last week in anticipation of Mango either this week or next. I mainly did it because I wanted to reformat my computer and I didn't want there to be any issues with a restore on my phone. It worked out just fine. I didn't really care about the text messages that much and I would have reset the phone anyways just to make sure there were no ghosts lingering for the upgrade process.
Only problem now is NoDo SUCKS compared to Mango!
Please arrive (no pun intended) soon Mango so I can get back to sanity LOL!