let's leave this for another thread really...probably one isn't even needed as the topic has already been beaten to death a bunch of times...you mention PID
PID is there even with load targeting...PID control or controllers are in all kinds of places, here's a little wikipedia for your reference:
http://en.wikipedia.org/wiki/PID_controller ... you'll see soon that the DME has a PID algorithm of its own otherwise shit would hit the fan very quickly lol
Once ATR is out you'll know/see/be able to modify everything to your liking..at the moment you can go by what they say today and choose to trust them or not...why would they tell you one thing now only to release it for you to modify later and find out they lied..wouldn't make any sense..