Uhmm I'm not questioning the possibility at all that he might or might not have some sort of insider knowledge, but what he said so far doesn't take that much more than common logic. Alas for all 2009/10 GPUs if 40nm wouldn't provide higher frequencies with higher transistor counts than today (yet not necessarily as large die area).
True, but he seems pretty confident about some specifics both here and over at 3dc. As far as samples being in the hands of devs, it seems kind of early for that. Are samples usually out this far ahead of commercial launch (assuming said launch is in late Q3/early Q4 09)