Based on what? Kucherov played 17 AHL games. Killorn 54 AHL games, Palat didn't even play 2 full AHL seasons, Johnson only 2 AHL seasons. He sure doesn't have a history of making prospects over-ripen in the minors.
Kucherov called up: 20-year-old
Cirelli called up: 20-year-old
Paquette called up: 21-year-old
Palat called up: 22-year-old
Johnson called up: 22-year old
Namestnikov called up: 22-year-old
Killorn called up: 23-year-old
Gourde called up: 26-year-old
Jonathan Drouin was put on NHL at youngest age, as 19-year-old, and he failed most bad.
Now they are calling up those lesser prospects, like:
Mathieu Joseph, 23-year-old
Alexander Volkov, 23-year-old (traded to Anaheim on expansion purposes)
Mitchell Stephens, 23-year-old (traded to Detroit,
was replaced with 36-year old Bellemare, is that Ken Holland operating at Tampa? added also Corey Perry and washed up Bogosian)
Ross Colton called up: 24-year-old
Alex Barre-Boulet called up: 24-year old
It goes just like our prime era + low drafting.
At some point, when the prime era is starting to end, you have to find the stars again and it's getting harder and harder to find the new stars. You are getting lesser and lesser talent. Those guys coming from AHL are blooming later and later. Just like what happened at Detroit with our prospects. And at certain point, they are too weak at talent level to carry the team, anyhow, when the old stars get real old/retire.
You have to go to rebuild and draft the new stars.
Detroit did mostly a miracle by drafting the 2nd wave stars (Zetterberg and Datsyuk) to extend that 90's core success era.