The Golf Ball dimples are an example of a good idea taken out of context. The dimples are there to keep the flow around the golf ball from separating, on the inside of a tube that is not really a problem. That product sounds like a huge gimmick.
If you want a scientific way to measure the intake restriction have a look at this
autospeed article. If that doesn't help just search the website for other articles on air intakes. They have a 3 part series called
into the intake:- for FE focus on the mods which reduce flow restriction rather than the cold air intake stuff.