Yeah - Its a good example of myth busting as well reminding guitarists that the audience may not hear the apparent difference in tone that pedal mods are supposed to create. However, in my experience, one thing I would say is that if you, the player, interchange different op-amps in your regular pedal and with your regular gear set up, you will be able to hear the difference between say a TL72 and a Burr Brown. But - as the video shows - no one else will, so you may as well not bother.