Back in the 70s, I knew an excellent Rock guitarist in a Thin Lizzy / UFO covers band, who used 0.48 nylon picks, and 7 - 37 gauge ( Rotosound ) strings ! Incredible tone ... :o
Crumbs! Maybe they had small, girly hands like me too then!! (although I play on 9's mostly). Interested to try these Dunlop Jazz III's as well, expecially the Eric Johnson ones for a bit of a change.
I've often thought of thinner picks having less attack and therefore imparting a smoother tone. Is this the case?
Perhaps surprisingly, the reverse is usually true ( at least for me ). If I use a thin - medium pick, it gives a brighter, thinner, clappy / slappy sound on the strings. If pushing a sweaty old valve amp, the clappy / slappy doesn't really get heard ; but the difference was enough, that when I was last playing in a band, a Fender heavy 'California clear' pick - made me blend somewhat darkly behind the Keyboard player, and if I switched to a medium, I just
sliced through the mix. I also noticed when playing through my Tasco Phrase trainer gismo, that thin - medium picks gave clear harmonics and dynamics at low volumes, but the good old heavies, gave me strong fundementals , with little or no harmonic detail.
The Jazz IIIs that Twinfan uses for his " YC/DC" band, bite like hell, for although they are ( relatively ) heavy, they have a somewhat brash presentation - and a biting edge. It is more about pick composition above a certain weight though - as I bought a
very thick 'Dugain' carved agate to try, and guess what ? - click, click , click ... :(
However, I gather some smooth players like Matt Otten and George Benson get away with medium gauge, by ( I gather ) simply gripping the pick right near the point. My hero Joe Pass, used to snap his standard shaped celluloid pick in half, and just use the bit that still had the point on.