yes, you are the only one.
No, he's not. I'm not only with him, but I even predicted it might only support a single tablet even before they revealed it last year (I'm pretty sure you're the one I had a big debate over it with).
Frankly, I think most people are needlessly getting bent-out-of-shape over how many uTablets will be supported largely because they're just misinterpreting Nintendo's intentions with the Wii U's controls in the first place.
The way I see it, Nintendo isn't planning on making the system focused primarily around the tablet (though I'm sure a lot of games will focus around it, particularly 3rd party ones). I'm quite certain Nintendo intends to equally incorporate continued use of the Wii Remotes and in many instances the uTablet will largely serve auxiliary purposes-- such as being propped up and used as a DS-styled map screen for all to see, or directly attaching to the remote during single-player games (both of which were demonstrated in videos at last year's E3).
The way I'm picturing it, most games will be designed in a way in which you won't need more than one tablet anyway, so it won't be an issue.