We're already aware that NBC essentially passed on producing Top Gear USA, but up until now, the reason behind the decision hasn't been clear. During an interview in Australia for Top Gear Live, Jeremy Clarkson was asked about the U.S. version of the program and said, in no uncertain terms, "That's been canned." Clarkson went on to say that when the program was focus-grouped, the viewers, "... just don't understand a single word we're on about. They just don't get it really."
The interview (video posted after the break) covers several other details about the show, the Stig and the typical Clarksonian blatherings you'd expect. But at this point, it's abundantly clear that Top Gear USA is dead, despite thousands of Stateside fans that do, in fact, "get it."