One of the tech blogs (might be Engadget) ripped the device for this problem.. I would surely wait for these things to be sorted out before the release of the device and OS...BlackBerry Torch review -- Engadget
"Unfortunately, there's one piece of this puzzle missing, and it's a doozy: when you make changes directly in your Gmail account (in a browser), the changes take ages to get pushed back to the phone. In fact, sometimes the changes never seem to make it back to the phone. So if you just triaged your inbox on your computer, your phone will still make it look like you've got an inbox full of unread messages -- and they are unread on the phone. There seems to be a fundamental breakdown in this stage of Gmail for RIM devices, and it makes dealing with Gmail accounts on the phone a royal pain. Now, that may not bother a lot of users, but if RIM wants to attract the everyman to this phone -- the person who actually uses Gmail -- it's going to have to do a little better than this."