Watch the Hamburger Meat Solo 2 online guitar lesson by Chris Buono from Guitar Lab: Blues Soloing
It's not until this second chorus, as well as the following third chorus, does the Dorian element rear its opposite-of-ugly head. In this chorus you have the 6th acting as a sort of tennis racket that sends the oncoming F# back out to the courts to lead into a cool phrase. Over in the third chorus it will be totally on! While the Dorian aspect is not so present in the lines like it is in the comping riff, so what - you have some guttural double stop two-bar motives to rock on.