Where is the stat that measures heart?
Where is the stat that measures a team's belief in itself?
Where is the stat that measures leadership? (your captain takes a brutal stick to the eye, gets four stitches, comes back and continues a nine game scoring streak)
Where is the stat that measures team conditioning?
What PDO measures is shooting % and save % and if a team is putting up better than average numbers - you will likely get some reversion to the mean - but it could also reflect team structure, conditioning and effort.
If you are driving the net, putting pressure on the opponents defence and shooting from the dirty areas - you just may sustain a higher shooting percentage than if you are just firing at the net from the periphery.
If you have five guys on your team all piling back to play defence and provide puck support in your own end - you may just sustain a higher save percentage.
Not guaranteed, but not impossible. Still lots of things advance analytics cannot measure.
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