There has been a growing trend to bottle whiskys earlier and earlier Kilchoman 3yo, the Port Charlotte series at 5,6,7 and 8yo, Ardbeg Very Young (6yo I think) etc. They are all (at least the ones I've named, there are some really bad young whiskys, but no reason to go there) very good whiskys, but upon drinking them I can't help but think what might have been had they been left to age longer.
Technology especially in regards to barrel manufacturing and selection, warehouse management and computerized vatting has allowed distilleries to do some pretty funky things that would have never happened years ago. Technology, however, cannot replace the craftsmanship of an old whisky. A 30 or 40 yo Highland Park is so much more layered and complex than a 12. It tastes of sherry, wood, resin, sea air, must, and everything else that occurred around it for the last 30 - 40 years. It might not be to everyone's taste, but to make a blanket statement that whisky peaks at some arbitrary range is ridiculous.
This argument has nothing to do with price by the way. Older whiskys are ridiculously expensive and I can certainly understand the argument that they are not worth the cost, especially if one lacks the palate to appreciate all the flavors and taste the complexity.