Great write up, Kris. I was getting ready to clean the MAF this weekend actually, never done it before. I got rid of the K&N I had in there for quite some time and replaced it with an OEM paper filter again. I think the K&N oil f*cks up the MAF and clogs the intake somehow over time. I'm going to see if there are any noticeable results after I clean it. I think the HP claim is in regard to a dirty MAF already "robbing" you of power. It doesnt give you extra HP, just restores it to where it should be.
If you have built castles in the air, your work need not be lost; that is where they should be. Now put the foundations under them.
-- Henry David Thoreau