If you can consider Lafontaine, Modano, Kane, Quick etc. to have been at the top of their positions you HAVE to consider
atleast Kurri, Selanne, Kiprusoff, Rinne and to a lesser extent a guy like Lehtinen to have been at the top of theirs.
More on the actual topic at hand: Yes Granlund was overhyped. This is due to the fact that after an amazing generation of finnish players like T.Selanne, S.Koivu, S.Kapanen, J.lehtinen, O.Jokinen, T.Numminen, K.Timonen etc. Finland hasn't been able to produce much NHL talent outside of players like M. Koivu, V.Filppula, T.Ruutu, J.Jokinen, J.Pitkanen none of who are that young anymore.
(I'm not counting the goalies because by some miracle there is an abundance of great finnish goalies; P.Rinne, T.Rask, A.Niemi, K.Lehtonen, N.Backstrom, M.Kiprusoff etc.)
So after a long-ish dry spell of high-end offensive talent from Finland Granlund had the unfortunate fate of being drafted 9th overall and on top of that winning the Finnish championship and World championship (+ the lacrosse goal

) in the same year. This caused the finnish tabloids to go crazy on Granlund and the more casual hockey fans to believe it.
After this there have been many finns drafted high in the first round (Armia,Teravainen,Maatta,Ristolainen,Barkov) none of whom have had nearly the amount of hype that Granlund had.
Anyway, the future of finnish hockey is now looking brighter than it has in a long time. And it is way too early to give up on Granlund, he has the talent and hopefully starts adapting more.