IMO, I wouldn't consider either one of them a JAG, or Norwell or Mike Jack. I define a JAG as someone that can be easily replaced cheaply on day 3 of FA. A perfect example is Nick Scott. A deent enough back-up but not a starter. We let him test FA this offseason, no one made a good offer, we brought him back then drafted his replacement (I hope).
Luvu, Shaq and Norwell were all starters that we let walk for financial reasons... And they all got picked up immediately by other teams. After they left us, they were missed. I fear that the same thing will happen next year with Jackson.