ea6bflyr,
My stash job at API was writting questions for the new ASTB. The new test will be progressive. If you get a question right, then the next question will be a little harder. Get it wrong, then you get an easier question. From what I understood meeting with the team in charge of the new test, it is still in the developement stage. Filling the question bank, then questions reviewed, etc... The last I new, it was still a year or two away from being used. It was sort of scary that API stash ENS's were the ones writing the new test questions. Those of us writing the questions joked about it. The new ASTB will be more like the Air Force AFOQT. The team developing the new test has looked at the AF tests and other test like the SAT, ACT, etc.. I believe that the new test will be a much better judge of what people know. So to answer your question, if you are talking about the "new" test, it will be a while.
Dave