JR, interesting to know. On the other hand, there are so many more types of braids today than 10 years ago, that I expect the exact number of correct turns depends on the brand and pound test in question, just like mono. The braids sold for fly backing are made a bit differently and feel different than an old-school PowerPro, and now there are "fused" braids, too. They're all a bit different in knot behavior.
I don't have a testing machine, but I do test knots for the specific materials that I use. It is a reassuring way to spend an evening. Loops are the easiest to test. I make 2 different loops in a 1' length of line, insert a chopstick or screwdriver in each loop, and pull it apart. Best loop wins!