Fair enough, I'm not trying to suggest this is some grand conspiracy, it just struck me as a funny phrasing given the shared history of the two layout engines.
Will be fascinated to read that. I remember during the keynote when Safari was announced thinking it was bizarre (not to mention risky) that Gecko wasn't used, but, I knew you all must've had your reasons. As a regular user of Safari and/or WebKit on at least five different platforms, I'm rather happy with how it turned out.