Watch the Stroll online guitar lesson by Jasper Mortier from 50 Blues Bass Licks You Must Know
Technically speaking every shuffle is a 12/8 (since there 3 1/8 notes per beat instead of 2 in a straight groove). But I guess because the drums plays all of the 1/8 notes (in a regular shuffle you leave out the second) that’s a way to distinguish it from other shuffles. Little by Little is also played with this kind of feel, although the drums plays more of a regular shuffle. Still you'll notice the strong forward drive. 'Please Believe Me' by Charles Brown shows you the relationship with New Orleans shuffles.