I get a sense that you are a bit of a troll (just being honest here - given your avatar and some of your comments)
While I don't agree with Hillmann that the use of the collar (even at such low levels) is all 'positive' - I believe his reasoning is that the dog gets so pumped up (in drive mode, essentially) that the constant ultra low stimulation 'nicks' in conjunction with the excitement of the 'drive mode' makes the entire training scenario 'positive'. This, compared to the traditional 'good dog' or occasional fun bumper, moves away from the more traditional type training.
Does it work? many say it does, and many say it is a better method for those who are opposed to higher pressure training OR are new to the use of an ecollar.