If what you mean by "subtle" is that there's no fret clatter or finger noise, and that he's dialed out a lot of upper-mid/low-treble, I agree with you. Pino Palladino also has a tone that I'd call subtle vs. "cutting."
Most of the young players I hear use rounds and prefer a cutting sound with far more treble and "gank" than I like; subtlety is underrated.
