Yep. I've narrowed my use down to 5 or so different types: Dunlop T3 in .73 and .88, Dunlop tortex in .88, Dunlop carbon fiber jazz 3, and Pickboy carbon in .88. Even just between thr T3 (which is tortex, but with a jazz 3 point) and tortex at the same gauge I can hear a difference when I'm just sitting and noodling. In a band setting... Not so much.
With this stuff it's all just a matter of "what percentage of the overall tone is it responsible for?" And we might be able to notice the 2% thing in some contexts, but probably not others.
I completely agree. I played Dunlop .88s for years, but still have 400+ of some custom picks my wife got bought for me back in the '80's, that are a thinner plastic type. Sound totally different. Now I'm playing a Tortoiseshell-like pick my daughter found in Japan last year, that seems to have a faster snap-back (when bent back while attacking a string) and great articulation.
Early on, I thought getting specific gear (guitar, amp, ...) would make me sound just like whatever other guitarist you might insert, but the human part of the equation (hands, fingers, hearing, internal rhythm, touch, ...) is hugely responsible. My band in the '80's had two guitarists, myself and the talented Mike Fleming. We both played Mesa Mk IICs as well as Dean guitars. There were enough sonic differences so we didn't just become a muddy mess: I had a Dean Baby V, he had a Dean Strat style w HB pups; My Boogie was a IIC-, his came later and was a IIC+; My Boogie has an EVL speaker, he got his w their Black Shadow. He would ask to play my V occasionally, so I'd grab his guitar, and we'd just leave the guitars plugged into their respective Boogies. He immediately sounded like himself on my Basswood-bodied guitar, and I, like myself on his. That was a total eye-opener for me. Now, I want to play a guitar or amp first, to see if it gets along with ME, before deciding to buy. Although, there was this one little black box thingy that I've always bought without demoing... what was the name of that thing, ... oh yeah, The AxeFX (Ultra, II, IIXL+, III, III MK II). I totally love how Cliff and team have created and continue to evolve the Best Damn Modeler on the planet!
Cheers,
Lee