Based on my experience, the famous one usually are high volume, and the high end usually low volume, since not many can afford them.
You don't have to agree with me, but use your own judgement.
I knew some SPs, even after they quit, we still in contact, and they still offer service to me exclusively.
In my 30 yrs experience, i never catch anything, and i prefer bbbj, but no DATY for me.