I can't give you any definitive evidence, but I do know that my rogue with very low int/wis and higher strength/dex seemed to gain skill in fletching (sometimes I like to pull) much faster than she gained pottery (poison vials are expensive) and no faster than my ranger who has a better wisdom.
I didn't have logging turned on, so I can't parse it, but that's how it felt. Might just be confirmation bias...
Edit:
According to the relevant file in the EQ Emu source-code (
here), dex will affect fletching unless the P1999 development team changed it. It was dex-based in 2004 (Gates of Discord era - [
SRC]) and that's the earliest I can find any answers either way.
Anyone want to make an alt, max out dex and compare fletching to pottery? For science!