Like others, I was impressed with the 2009 version of Jay. He has often been underestimated, but when on his game he is a legit force. That said, and despite his great showing this year, let's not get carried away. While I do believe he could give 1995 Yates a run in some ways, let's not delude ourselves into thinking he would dominate.
When it comes to conditioning, Dorian wrote that book. Jay could come in on point, but Dorian would still have the edge overall. No one came in as hard and grainy as Dorian. In terms of size, Jay has size to spare and may have a slight edge in thickness. However, Dorian was no slouch here either. Dorian would hardly be out massed. Dorian was so dense and conditioned, that he made heavier competitors sometimes appear smaller in comparison. Nasser is but one example of this. It would be an interesting scenario, but I don't see Jay coming away with a win over 1995 Dorian. Not unlike how I could never envision Dorian, under any circumstances, losing his title to Dexter.