Now that the accuracy issue is settled and assuming the PPG numbers where transcribed correctly we see how top line centers/forwards perform in a 30 team league.
Staal and Ribeiro played on teams that rarely made the playoffs with little linemate support and weak puckmoving, first pass, transition d-men.
Stamkos, Kane(3 SCs) on better teams with better linemates and well above average puckmoving, first pass, transition d-men.
Malkin's numbers on an offensive oriented Pittsburgh team with the advantage of Crosby drawing the oppositions main defensive focus have to be viewed in a league context.
The comparables in question simply show that given ideal circumstances like Malkin had in the KHL - NA coach in Paul Maurice who knew how to tailor an offence around Malkin, support from other forwards and an ideal defenceman in Sergei Gonchar :
http://www.hockeydb.com/ihdb/stats/leagues/seasons/teams/0050272013.html
he will stretch his offensive numbers. Without such support there will be a contraction of numbers.