You could say that to just about any player in the draft aside from the top three (Reinhart, Ekblad, and Bennett). Consistently should be a concern for him since he plays on a weak Niagara team. I don't really see that much of a difference between Dal Colle and Perlini, expect for one plays on a stacked Oshawa team, while the other plays on a terrible Niagara team. If Perlini played a full season, he would have scored over 40 goals, 80+ points, and would probably be ranked in the top 5.
You shouldn't put too much on being a perimeter player. I mean if you are able to score 30 goals, then who cares where you score your goals from.
Jeff Carter, Patrick Marleau, Jeff Skinner, and Max Pacioretty, all are considered comparable to Perlini.