Well, AT tires are not going to make a big difference in mud. But we have covered the topic 100 times already.
In fairness to Rally, we use performance Nitto 420S tires on the Tribeca. They stick like glue and are tough as nails. In fact, the tread area has more plies (6) than my tough P-metric Wildpeak AT3Ws (5). Now, the Wildpeaks have the same sidewall protectors as the toughest E-load AT tires whereas the 420s are completely bold. And the Wildpeaks have mighty tread blocks with the 420S looking like rally tires in comparison. The 420s would have mediocre grip in most off-road terrain (except pure sand or mud which equalize most tires) but there is no question about them being tough. We have not had a puncture on road. They may be the only road tires we have had that have not been punctured around town.
I can see how if you stick to maintained dirt, sand, and occasional mud a performance tire may seem like the best thing overall. But that's not what we do offroad. We need tread blocks and voids that allow the tires to bite loose in different ways terrain with lots of rocks of all sizes and also tires that have strong enough sidewalls to be trusted in the rocks.
And again, the entire debate started because -- if I recall correctly
-- Rally pitched his claim as a generally valid one instead of something that applies to a specific driver, specific tire, and a specific car.
For most folks, picking a random AT tire is a much better choice than picking a random street tire. If you are as deeply into tires as some of us have become
, then you may find a way to go against the grain and be happy.