What i initially wrote and has been misconstrued was that van persie will soon (if he scores a couple more this season) be as influential in a premer league season as henry and ronaldo who scored 30 and 31 goals in a premier league season, i wasnt comparing the players but in terms of importance to the team in goal stats he is reaching their "level" this season. Ronaldo practically won them the title that year, same with drogba when he hit 29 yet we have "that" goalscorer but havent won it. If we add someone like a rooney or anelka to come partner robin we will most likely win the league.
However you say it not many, if any can, score 30 goals or more in a premier league season, if van persie reaches that level he is up there. Obviously he has to do it for a couple more seasons to be regarded on henry greatness.