I agree with him and had made the point before he wrote about it.
1. When there is a treatment for AD then there will be a market to test. Ask your doctor as others have done on other message boards.
2. The means of the test to be used in research will be the best test available, because it has a LOT to do with whether a treatment is found to be adequate or not.
I prefer going to the source rather than a 3rd party associated with P&Ds. I'm quirky like that. Seems to find fault in everything AMBS does, but all other sources cannot do wrong. Go figure.