Thanks for the info.I aged mine a bit, but they were ready and tasted good at the 3-6 month range.
I have several ports aging, one is nearly 3 years old. I'll be using the older ones, doing my best to stay away from the younger ones for a while. I have FAR more dessert wines made than I visualize needing in 5 years, but that is the best way to ensure wine has a chance to age -- gotta make more than you drink. Curiosity is not just a cat trait.
Of course, when this year's port kits come out, I'll have to consider things ...