But it's clear to see the flaws in the system. Not just shot quality, as everyone points out, but also shot frequency. We saw the ultimate failing of the concept in a few of the games against the Coyotes last year. There were games where we got out-Corsi'd hard all game long, but were clearly in control all night.
Without dragging this thread off topic...
Strong 5vs5 Fenwick / USAT-For% generally leads to a Strong 5vs5 Goals-For percentage. Here are the ten best USAT-For% teams of the 2014-15 season:
1) LA
2) NYI
3) Tampa
4) St. Louis
5) Nashville
6) Pittsburgh
7) Chicago
8) Dallas
9) Carolina
10) Minnesota
and here are the ten best 5 vs 5 Goals-For% teams:
1) Nashville
2) Tampa Bay
3) NYR
4) LA
5) St. Louis
6) Montreal
7) Chicago
8) Winnipeg
9) Minnesota
10) Pittsburgh
You can see that the biggest "difference" between the two statistics, is mostly goaltending. Carolina, Dallas, and the Islanders did
not get very good goaltending. Montreal, the Rangers, the Predators, and even the Jets got strong goaltending
at even strength.
Special teams also matter. Whether that's Power Play, Penalty Kill, 4 vs 4, or even Shootout. These are things the stats don't measure, and they can greatly influence
perception of which team is in control. Score a power play goal, kill a penalty, trade some even strength goals, and you just won 2-1 and looked fine doing it even if the numbers, which only look at 5 vs 5, said the other team was 8-10% more likely to score at 5on5. And that's really how fine the margin might be. A 46-54 disadvantage is not terrible odds, but it's a disadvantage all the same, at the type of hockey that is played
the most often.
Where was Calgary in all this? 28th in USAT% but a better 21st in GF%. A high shooting percentage managed to shift the goal scoring, but not significantly so. We were
still bottom 10 in even strength goal scoring percentage. It was a legitimate weakness no matter which
stat you want to use, the USAT% or the GF%. One stat isolates the variables of individual skater accuracy and individual goaltender ability, so why ignore it? But sure, keep dismissing it as "
useless".