Dave,
You are correct, I have never Blitzed, BUT I have a good understanding of the method used and the adaptation that comes along with the program. This is why I agree it is a very effective program. I suppose you can say my opinions are based on assumptions, to a degree, but they are certainly not hollow. I have actually planned to work the Blitzed method into my personal program later on in my plan. I'll be sure to keep you informed on how it goes.
I think its VERY important to know the why behind methods used. Blitzed is based off of Escalating Density Training (EDT) and if readers are interested, I suggest looking it up. The human body is an amazing thing! It adapts to any stress we put on it and then it plateus until we change that stress. This is why I would work Blitz into my overall training plan and not depend only on Blitz. The body needs the change to continue to be challenged.
V/R
Matt