Well no, nothing that drastic! The most likely explanation would be a problematic driver or a low level hardware conflict somewhere. I know you've tried a couple of different drivers but they're usually the cause of problems like this. Having said that, it's also entirely possible that the tablet is indeed faulty. But you won't really know that for sure until you've absolutely eliminated the possibility of a problem in your computer.
Like I said, I totally understand your frustration. But it's only through a rigorous process of elimination like this that the root cause of the problem can be found. It sucks, but that's just how it is.