An AE driver not running a product does not make that product a bad product by default. Maybe some do, maybe none of them do. Maybe some run them when at a rough outdoor track and AE hard at a perfect indoor track.
Maybe they dont talk about it and it cant be quoted.

And some of the drivers that have ran Durango diffs have also ran ball diffs as that was the better choice at the given track that they were at. So gear diffs are best for everyone when pros are using them and the next week at a different track running balls so now balls are best for everyone. .. no.