Since 2004 I've had my tires mounted and balanced on multiple vehicles at multiple DT stores and 'never' had to go back for a rebalance that was caused by incorrect/improper balance. I had one take back because I noticed a vibration after leaving the store. The cause, a warped/bent steelie that was shown to me on a balance machine when I went back. I replaced used from Honda boneyard, all good.
As for a DT "instruction" of only going to ".25" on the balance machine(s) as SOP, I admit I never paid that close of attention. As I've never had an issue, no need. Going forward, I'm now going to watch much more closely to see if that is really a 'policy; or just an anecdotal experience given on a forum. I know I have seen OK on the machine with balance before, just can't say for every tire.
As for topic tires, no experience with the Arizonian tire brand made for DT/AT. However, I do have experience with a made for DT Yoko tire. IME, I know they stand behind the treadwear warranty as long as tire rotations and balance done as recommended (5-6k mi) at DT. I had that with an early DT Yoko YK series, just can't remember which one. They gave me what I considered to be a very fair prorated credit towards a new set of tires.