>>revise+(OP)
I've been tying Ian's "world's fastest shoelace knot" for a few years now. It took me about a week or two to get comfortable with it and it really is amazingly fast.
It's interesting to experience your brain relearning a habit that has become so ingrained. Reminds me of the Smarter Everyday backward bike episode [1]. In fact, I just tried to tie my old 2 loop knot and accidentally tied Ian's knot again.