So, speaking as someone who actually watched him play
http://forum.calgarypuck.com/showpos...&postcount=457
His skills levels are high, but he is very thin for his size and definately adjusting to not being the best player on the ice. It is WAY too early to either clai he is a bust or a sure thing.
My opinion is that Providence do not have a very good team, certainly no Kreider to look up to for Jankowski. He has the highest shooting % on the team, and the only player with more goals than him is a year older and coming off being named to the Hockey East all rookie team (Mauermann 5-9, 170lbs, 4 g, 2 on pp). Jankowski is very young, 1.5 years younger than fellow freshman (de Jersey, 6-3, 205lbs, 2g 3a= 5pts) and 3.5 years younger than Mauermann.
Be patient. It won't be until the end of next year before we can really say anything. That said, if he gains weight and shows a little more intensity, he'll be fine.