For those visually interested, here is the experiment update. A mchoice, 12lb Packer trimmed brisket. Cleaned it.
First, I found my Tenderquick:

Rubbed the brisket, meat side, liberally with the TQ. Let sit 3 min, and rinsed thoroughly.

Results:

There was no residual Charcoal in the smoker. I used new wood and the results are completely caused by the application of TQ.
The brisket did not taste any saltier, but I did get a few people at the party who said "man, this is good stuff and wow look at that perfect smoke ring"....

Enjoy