No unfortunately i don't agree with this at all, if you've been playing your pedal a certain set up comfotably for years and then you play someone elses who is the complete opposite, you will find yourself struggling. I would say the way the gear is set to your liking is about 50% of the overall contribution. I played a mates pedal last night which is completely different to mine. I play 6.5 inches from the head, medium tension, full beater length and the footboard as flat as it can go, he had his set full spring tension, medium beater length, 4 inches from the head with about a 35 degree footboard angle. Lets just say i couldn't play it very well at all.i agree
i think when you get the skill after all the hard work, equipment is like 0.01% of the whole thing, so..
Also i agree that the quality of equipment doesn't really affect your playing but certainly how the pedal is set up does? If you are used to a set up that is comfortable to you and suddenly change, your playing will suffer (by the way i am talking about double pedals here not singles as singles are usually fine).