Couldn't agree more. He's my favorite living guitarist, and I think Jerry and Duane are the only ones I would put above him for my tastes.Derek Trucks is an absolute savage on guitar. I'm a big metal fan so I'm familiar with plenty of guys who are more technically proficient (Petrucci, Malmsteen, Mustaine etc), but Trucks has an "it" factor that is hard to describe or quantify.
He does more with less notes than any guitarist I've seen. That's about the easiest way for me to sum it up.From what I understand, it's similar to the modal approach for which Miles and Coltrane are often credited, and it has as much to do with the notes they don't play as with the ones they do.
I suppose "elegance" captures the essence as well as any word I can think of.