Finally ran into one ... My rheumy is retiring, so I'm switching to another doc at the same practice. Before I do so, however, I had to meet with a nurse practitioner.
Reviewing my pred use (I'm at 4.5 after a long, slow process with the occasional flare), she very firmly stated that I need to reduce by 1 mg every 2 weeks. I was pretty speechless.
My old rheumy was quite content letting my endocrinologist take care of the pred, and she was more than happy to let me go as slow as I liked.