I think the question of size can and must be answered in two parts and yes I read the article.
Part One:
Regular Season- Size doesn't matter as much in the regular season because although some teams play a tight checking game and there is proclivity for some rough treatment at times, there is still opportunity for small highly skilled players to create offense.
This is especially true in the last several years as the league has introduced more young players sooner in their careers.
Part Two:
Playoffs- Size matters more in the playoffs. I'm not saying you need a team of 6'4" 225s but when the going gets tough, and there is no tougher playoffs than the NHL playoffs, you need a big defenseman or two to lean on opposing players and protect the front of your net.
A big forward to fly in on the forecheck and rattle defenders bones with huge hits.
You need someone to stand in and protect the small skilled guy who just got caved in in the corner for the third time tonight and can't find any open ice.
The good teams have found that balance. A good Sabres team will need to as well.