How many is really mastering GTD?

There is a thread at Google Groups : 43 Folders regarding "How many is really mastering GTD?". No one can be a master of GTD IMHO. Maybe with the exception of Rev. Allen. Being a GTD follower since 18 months, I have found that those that are successful with their GTD implementations are those that have stopped trying to fit their life into GTD, and instead tried to make GTD fit their life. I belive this is one of the reasons why many struggle with GTD; they try to implement it "by the book" which is in most cases impossible.

Getting Things Done, GTD, is not a goal in itself. It is one tool (but a very, very good one) of several.