From a slightly dated article:
So far this season, 392 games have entered the third with one team winning; 79.85 percent of them ended with the team that led getting two points out of it. They earned one point at 13.27 percent of the time, with an overtime or shootout loss.
In other words, teams with leads entering the third pull at least a point out of the game 93.11 percent of the time.
https://ca.sports.yahoo.com/blogs/nh...192353293.html
Also, IIRC the Flames had no wins after trailing for the longest time, so they are improving.