S. Abrams,
I think you are right. There are different definitions for a jump pivot floating around. I think that Kevins1 was basically saying the same thing as you. I believe that you are gaining ground with the foot landing in the center of the clock. I believe that it is OK for the foot to land 6"-12" forward of that (as you suggest) as well. Do you think it is OK for the foot to land at 6:00?