I will digress. I won't say they didn't know what they were doing, but they were not Doing It Right.
I don't consider Peter's site mandatory authority either, but I will say that zip-tied bungie necklaces were recommended to me (and it was suggested that I change my double-fisherman's knots to zipties) by my instructors from both 5thD-X (2008) and GUE (2009).
On second thought, I'm sorry I got into quibbling about such a minuscule detail. This makes nobody look good.