i've noticed im more comfortable tying sets of 10, instead of tying for my own box... (its been discussed time and time again, but im not sure what you consider commercial tying) to me, making, as an example, early black stones, 2 sets of 10, in 14 and 16, and not tying them again until the stock gets low is commercial tying.
i tried listening to the faster paced music, and still came up slow for my own flies.... i guess im just wired wrong lol
or maybe it has to do with pushing for better flies on the account that ill be the one loosing them...
i dunno, subconscious...'s are weird, i just enjoy having the finger memory.... as long as your hands know what to do, your mind will follow.