I have to go with Mbo on this one. I've heard lots of people play the structure of the blues, but if you don't have the feel that comes form the state of mind, it's no the blues.
The Blues is Son House, Robert Johnson, Blind Willie Johnson, Big Bill Broonzy, Blind Willie McTell, Charley Patton, Mississippi John Hurt, Bukka White, Muddy Waters, Little Walter, Howling Wolf, Billie Holiday, Taj Mahal, Johnny Winter and many others.
It is not seventeen year old white kids who've heard Stevie Ray Vaughan.
Regardless of what it is or isn't,thank God we have it, it's my favourite kind of music.