As I mentioned in a previous comment, on many trips I have been preassigned to the expert dive group or the expert dive boat before the DM even sees me, based on my certification.
I have never had a divemaster talk to me and ask me about my experience and the kind of diving I do before a dive. They are usually pretty busy getting ready for the dive.
I do my winter diving in South Florida. I don't know how many years it has been since a DM saw me during a dive. When I am diving, they are up on the boat. One DM that did happen to see me in the water came to me after the dive to say he saw that my knees were bent, with my feet up. He suggested ankle weights to get my feet down.
As for looking me and my equipment over and making appropriate judgments, here is what happened on a dive a couple weeks ago. According to their policy, I had to have a buddy. The DM looked at me and saw me with a well-used BP/W, a battered wetsuit, a tech computer in each wrist, my own steel tanks (not AL 80 rentals), my long hose/bungeed alternate regulator. He then turned to the instructor and young teen student next to him to ask if they would take me on as a buddy. The next day I went to the shop with my Solo instructor card and signed a solo waiver. Now I get on the boat without needing the DM to use his or her expertise because the manifest has my certification level clearly listed.