Not that I'd use them heavily loaded or X country trips, but these tires have a 2008 born on date.
Have had the truck (with these tires) for almost 2 years now. First year, we drove it around regularly, including hauling the boat (size of an avg TT) down the freeway. I haven't even ever checked the air pressure!
I'm not advocating using 14 year old tires, but 6 years, if not checked or cracking, is not time to replace. If you do, it's only out of lack of experience or paranoia.