Just my 2 cents.

Had an envoy dispatcher on the Jumpseat a few years ago, when they started this fuel initiative. He told me, his bosses would rather see us divert, then the dispatcher give additional fuel.

Then just last week, I had a dispatcher from RAH on the Jumpseat. They said Delta never wanted diversions or return to gates. But AA was always bare minimum on the fuel. But this person always filed arrival fuel, no less than 3100-3200lbs. And last leg to the hotel was .78 or better. I thought that was nice of them.