I'm all for giving credit where it's due and I think he could have mentioned the libraries he was using in passing, but.. you don't have much time in a 2 minute tech demo to capture the audience, and I don't think this audience particularly cared what api's he used. He did post links to Papervision3D and FlarToolkit on his blog.
If he indeed was just demo-ing something he built using existing libraries and a simple tutorial he found online ... that is a far cry from being able to claim he was demo-ing a piece of software he "wrote".
This is like claiming credit for a LEGO kit that you built by following the intructions. You end up with something really cool, but you had no creative input. It's much more admirable to take the pieces and turn them into something new that no one has ever thought of.
