I see you have been studying diligently under your bird master there grasshopper. The answer is neither. The average rack size across the board has increased because the average age of the harvested buck has increased.
Any idiot would know that the average rack size of the buck harvested would increase if you make it illegal to harvest smaller buck. but that tells you nothing about whether the average rack size of all 2.5+ buck increased or decreased ,so you are wrong again.
RSB provided a detailed answer to that one. If you missed it, click on the search link above and search for it under author RSB. If after reading RSB's detailed answer, you cant understand it, I'm afraid maybe you need more help than can be given by anyone here but we'll do our best.
And I proved he was wrong by providing the actual PGC data showing the distribution of the does sampled.
Blind followers can't see the forest for the trees.