Ahonen has gotten no play because of the giant brick wall known as Martin Brodeur, and if there's a jury out on Hale, it's whether or not he's going to be a #1 or a #6 - he's already an NHL caliber defenseman.
Besides, though we get our fair share of busts, Parise is the highest first round pick NJ has had since Lance Ward at #10 overall in 1996... oh, and Pederson was 12 years ago and Sharif 11.
If you look at those 12 years you mention at the other players who currently are in the NHL, you find more than your fair share:
Pandolfo, Morrison, Oliwa in 1993,
Elias, Souray, Sullivan in 1994,
Sykora and McCauley in 1995,
Dagenais, Boumedienne, White, and Mitchell in 1996,
Clemmensen in 1997,
Van Ryn, Gomez, Gionta, Dagenais (again), in 1998
Commodore in 1999,
Hale, Martin, Rupp, Danton in 2000...