I just went to the excellent Pinehurst Resort website, and stand corrected.
#3 and 8 have Champion Ultradrawf greens; 3 was in top shape and 8, a few miles down the road, was average.
#5 has Penn G-2 greens, and was in between the two in terms of firmness and true roll.
But that was only one weekend, in August. But whatever they're doing to/at #3, they need to do more, though I appreciate the comment about variety especially at a nine course report.