If they did they, which i doubt, they would not have learned anything they do not already know. You can buy or read about most everything regarding AP. Even with the information provided, they will still be hard pressed to spot you. I think there is a big misconception being discussed about getting heat, being spotted etc. In Las Vegas, you really have to be making a killing before you will be looked at. There was one photographer taking pictures but she asked if she could take our picture before she did anything.
Ms. M, a former casino manager ( I pretty sure you know her Ken ) was there to discuss some of the things they are looking for. For example: If you are betting red at a strip casino with wild bet swings, your just a tourist.
There are millions of people visiting casinos and to pick out a dozen faces from them would be quite a task.
Some of the people there may have only played a few hands of blackjack in their lives, there were a few who were obviously skilled. The piece written by Jeff Haney spells out the demographic of the seminar. Jeff has skills of his own ;-)
I am doing a write-up of my own on the Seminar and it will be online shortly, I will let you all know.