I think the are counting on current top gear fans.. most of which are used to the specials. 1st US trip, 2nd US trip, 3 wise men, Polar exploration. there is usually at least one, 1 hour special per season.

yes top gear UK did not start them till about season 10 of the new show. but they are part of the "new, new" formula. part that works... of course loren I know you don't download so many of the specials don't make it on TV due to the sheer legenth.