A little update (in case anyone's interested...)
At noon today, I sent a fax to the JW's reservation manager requesting an upgrade at lunch today and just went to the Confirm/Cancel Reservation section of the Marriott webpage to see if any changes had been made...
Lo and behold, it shows that my "Quality Room" has been replaced with a a "Hospitality Suite" (QAAD is the code.) Sounds promising. Any idea what this is consists of at the JW?