Hey, ADG, long time no hear.
Just thought I'd comment on the 60-70+ dive DMs. Unfortunately, they DO exist, and again, unfortunately, you see quite a few of them on resort islands like Koh Samui and Koh Tao in Thailand, and Puerto Galera or Boracay in the Philippines.
See, minimum dive requirement for (PADI) Divemaster is 60 dives. Some instructors choose to certify Divemasters after they've met the
minimum requirements, which means they've passed the written and physical exams, meet the logged dive, age, and medical requirements, and have assisted in the minimum number of classes required.
So you get a lot of green DMs. I saw a lot of them in Koh Tao, divers who went right into the Divemaster course after completing their Rescue Diver courses. Not that it can't be done, but I wish more instructors would exercise good judgment before certifying at the professional level. Not everyone is cut out for it. And for those who are, you can't get the depth of training needed after accomplishing the minimum needed for the certification.

On to less serious stuff, to those who asked, I would recommend Koh Tao as well, only a short hop away from Koh Samui. Nice diving there, and great beaches and parties.