You might be interested to know that Style says roughly one out of twenty people who start to learn PUA reach a high level of skill.
I personally agree with Martin however; especially in relation to diets. Diets DO work, they are just difficult to implement, changing your lifestyle often is; that applies to exercise, studying a new language or anything that requires a large time investment before you see payoffs. The math comparison is especially appropriate. In this way PUA is no different from any other self improvement course that you might decide to undertake.
That’s a valid point. Women who have read about the pickup artist techniques report that the techniques still work on them even when they’re aware the person is using them. On the other hand, SWIM says that being aware of various techniques has helped him guard against HR methods on the basis of “Oh, now he’s moving into stage x, next he’s going to...”. SWIM would say that it depends to what degree you’re predisposed against the person using them.
Be aware that some techinques are more obvious than others. Some are really obvious when you know they exist, but also really obscure, so you won’t know they’re being used unless you’ve read about it before.