In that case what you need to do is to unhook the existing jQuery script from WordPress and rehook in the Google copy. This is done via what is called "enqueue". It’s a little too complicated for me to explain in detail here, but some googling will help you find some information on it. If you sign up for premium support I could write a new plugin for you which does it automatically if you like.
Actually … it’s possible there is already a plugin which does this. I’ve never heard of it, but it seems likely that such a thing would have been created before.