The Adams attack is 6.h3!? against the Najdorf, with the intention of g2-g4 and Bg2, seeking an improved g3 variation.

I see. I always thought Black could get decent play with a quick e6-d5 in that line since White is taking his sweet time organizing his play. I could be very wrong, of course.

white does indeed get a comfortable game but if black plays correctly white should not gain any advantage.