I just tried Appleton 30 yr for the first time last month when I was down in Jamaica, and wow, I must say it was indeed quite amazing. I did a comparison of it with the 21 yr old, which yielded some interesting but surprising results.
Does anyone know if Appleton 30 yr spent any time in an X-sherry or PX cask? The reason I ask is that the 30 year seemed to have a lot of those notes in it, i.e, heavy dark dried fruit, treacle, a hint of smoke, and a faint hint of sulfur candle smell and pungency. Sulfur is often used in the x-sherry butts or wine barrels to kill any bacteria before the next fill. There were of course some nice sweet and sour notes, tobacco, dark chocolate, etc, that you would expect from long-matured product, plus the length and depth of the rum were amazing.
As wonderful and as much of a treat as the 30 yr is, I was surprised that I actually prefer the 21 yr old. It seemed a little less dry and better balanced on the palate, plus I didn't notice the "sulfur candle" note at all.
At any rate, I'd be very interested if anyone knows whether the 30 yr spent time in x-sherry butts.