The Panthers aren't just not big. They're small.
On the height side, nothing has changed. In every season of the salary cap era, the median NHL skater has been 6'1». Weight is a different story.
In 2013, when the Blackhawks knocked off the Kings in the third round (en route to their own title) their average skater was 11 pounds lighter than the average King.
The success of teams like Chicago and then Pittsburgh made it clear that some of the smallest teams in the playoffs could win titles, and that's when the trend really accelerated.
- Jonathan Willis