leeneia, with regard to the poster you cited being a student of the blues, aren't we all students of the blues?

That said, I very much doubt the validity of that student's theory that is given as your point #1.

For those interested in this subject, this website appears to be have pretty credible definitions of a number of blues terms:

Blues Words & Phrases

This disclaimer is posted on that page:

"Before you proceed...
This page is not intended as a work of science. Sources for this page are mostly visitor contributions, other internet web sites and, if available, relevant literature. Quality, accuracy and substantiation of the content may vary. Motivated suggestions and criticism are always welcome".

-snip-

Unfortunately, that page hasn't been updated since December 2000.