My understanding is that they revised their cam belt recommendations on all V6 models to 40,000 miles / 4 years. It's rather scary if they are giving out duff information on the help line.
I would stick to 40,000 / 4 years. There's certainly been no radical changes in design with the V6 in later models, other than making the bottom guide roller non-adjustable to "simplify"

the belt change procedure. Certainly nothing that would convince me that the belt / roller lifetime has been doubled.
I'm sure different driving styles make a difference to the belt life but without doing an in depth study of different vehicles how do you came to a conclusion either way?
Best to stick to what experience has shown, namely that a 40,000 change interval works well (anyone had any a cam belt failure in sub-40,000 miles?) and that VX reduced the interval from 80,000 miles because they were getting a significant number of engines not making this mileage before lunching themselves.
Kevin