[holo]

A quick explanation of what is occuring:

First off, it is probably not resending every text you have ever written, it is sending anything stored in your 'drafts' folder if you backed that up - I had this problem when upgrading to wm6.1 before. You can also see these texts in your sent folder if you are curious as to just what it has sent... Myself I had some very interesting texts go out and received several phone calls and texts from people who were like wtf?! Solution: don't back up/restore your drafts folder.

Also, as for the loading texts one at a time, that is windows mobile 6.1's threaded text message app 'threading' your texts (ie putting them into threads). This will happen every time you restore from backup and will take quite a while if you have a lot of texts. Also if one thread gets too long you may notice that it messes up and only shows your sent ones (or received, cant remember which) without threading properly (new ones will thread fine). I would recommend scaling down the size of your text messages as it's hard to look them up past a certain age anyways - ex if you have 5000 sent/received between you and one person just delete all of those. That will make it far faster. Otherwise you're gonna have to wait it out until it's done. It will go through all your received texts, then it will go through all of your sent texts, in chronological order. The only solution for this is to turn off threading (which can be done by a regedit) or to clear out some text messages.