It's probably a combo of copious amounts of dry hopping, possibly dry hopping in multiple stages, having packaging that does a good job protecting the integrity of its contents, and having the luxury of canning a fresh batch every week so the consumer has a better chance at consuming it as early in its life as possible. BTW my first clone attempted is chugging right along. I hit a 1.072 OG (was aiming for 1.071) and so far my gravity is only down to 1.016 (hoping to reach 1.010). The smells and flavors are quite tropical and the color is somewhere between pineapple and orange juice! I can already tell that even if this clone attempt results in a far cry from HT, it still has the potential to be a great brew in its own right!