There is one other thing which i forgot to mention. I have an hypothesis as to why this technique works. Let's see you memorize 20% of the things you see/read (not an accurate number, but it will do for this explanation). If you look around in a 'normal' way, let's say you see 5 objects per minute (again not accurate, but good enough for this explanation). With the 20% memorization, it means you memorize 1 object per minute. Now, while using this technique, you kind of see more (it is a variation of ADA after all), let's say 20 objects per minute. Even if the technique doesn't actually improve the memorization of 20%, it does mean you memorize 0,2 x 20 = 4 objects per minute, opposed to the 1 object per minute when not using it. Keep in mind that it doesn't have to be an actual object, 'object' can also refer to formula's, pieces of a text, or whatever you like.

In other words: I suspect that the biggest power of this technique is not boosting your memory (which it may do, I'm not sure), but boosting the amount of things you see and the amount of attention you pay to them, thus leading to memorizing more/better.