I will agree that it is all about the paint.
Saying that this method is cheaper and faster is debatable.
8 towels for a single wash, doing 2 cars twice a week is 32 towels @ Garry Dean price of $10/towel, that's $320 just for towels. Versus 4 chenille wash mitts @ $10 = $40 plus $18 for grit guards (assuming you use them), it's five times the cost for the garry deam method. The cost of water in my area is 10 gallons/$0.01. Assuming I use 4 gallons of water per wash instead of 8, the break even point for me between the 2 methods is at 16375 weeks, pretty sure I'll be replacing the towels before then. It may make sense for mobile guys that can only take so much water with them, or people that have water restrictions, just doesn't work for me.
I don't see it being any faster either. Same # of trips to the bucket, now your folding a towel instead of rinsing a mitt, but not really saving substantial time.
And to those that say he's just capitalizing on the name, he very clear on several occasions in the video in question that he created this method, and it's pretty apparent that he did not. But that is the status quo in marketing.
He's a knowledgeable guy, and seams like a decent detailer; but he's a saleman in his videos, not a detailer. Just like a commercial for crecent rolls where the family is so excited to eat a hotdog rolled in a crecent roll; or the recipe for a margarita on the back of a bottle of cointreau, it's showing a way to use a specific product, and in this case a method that maximizes profits for the seller.