Assuming they bundle Natal prior to and then through December 2010 then sure, looking at this years sales, even if 360 was down YOY millions of consoles should sell in the latter end of the year, and if enough are bundled then his quote will be accurate.
Now, if Natal is sold purely on it's own I'm not so sure, unless it was bundled with a game MS managed to generate a lot of interest in.
Try to be reasonable... its easier than you think...