I've had a bunch of jolly pumpkin with age and to me they've all been good but none were ever quite as good as they were fresh. That being said, I'm sure they'll all be quite tasty when you open them.
i have a friend that swears that aging lost abbey red poppy for a few years radically improves the beer. have never held onto a bottle that long but now i'm curious to give it a try.
Some sours age some don't. Some sours are bottled young and need a little time, Surly 5 and The Dissident are great examples. Although Dissident drinks so damn good young 6-9 months make it turn heavenly. Surly 5 young was so sour, but a year turned that bad boy into amazingness.
I cellared a bottle of Duchesse for two years and it did NOT improve. It came out tasting a bit like cider which was weird.
In my experience Jolly Pumpkin ages pretty well. I'm sort of scared to open my bottle of La Parcela from last year, but Noel with a year or two on is is way better than it is fresh. Drink 'em up!