Yeah...that plays exactly into what the quote said. They were basically just shooting just to get a high shot volume, which is what Johnston preached. Their SH% was low, but the shots weren't high quality.
So while they were 3rd in shots, it didn't mean much.
Using war-on-ice.com's metrics, the Pens averaged 28.4 scoring chances for per 60 minutes under Johnston and are averaging 32.8 under Sullivan -- so they are recording more scoring chances. However, much like shots, they were already near the top of the league sitting 4th under Johnston and 2nd under Sullivan. As for high dancer scoring changes, they averaged 11.6 per 60 minutes under Johnston (7th) and are averaging 13.5 per 60 under Sullivan (4th).
So really, there hasn't been a large change in shots or scoring chances for. Even their shooting percentage hasn't changed that drastically, going from 7.70% (27th) under Johnston to 8.60% (17th) under Sullivan.
They've definitely been more productive offensively, though. They've averaged 2.97 GF/60 (7th) under Sullivan compared to 2.33 under Johnston (26th). But they're also seen almost an equal decline in goal prevention, going from 2.29 GA/60 (8th) under Johnston to 2.76 GA/60 (23rd) under Sullivan.
To break it down even further, the Pens have been like a whole new team since the time they traded for Hagelin (and, shortly thereafter, took Cole out of the lineup). From the time Sullivan took over until they traded Perron, the Pens were scoring 2.50 GF/60 while giving up 2.61 GA/60. This also roughly coincides with the last time Cole played. Since Jan 22
(Cole's last game was Jan 21), the Pens have been scoring 4.1 goals per 60 (3rd) but are also giving up 3.2 goals per 60 (24th).
Now, I'm not about to argue that the Pens don't look better under Sullivan because they do. They look much more engaged. Crosby looks rejuvenated. But from what I'm seeing in the numbers and circumstances, it would seem that the roster moves they made may have had a bigger impact than the coaching change.