Absolutely. I'm sure the official Norfolk Ryan Mountcastle Swing Decision tool kit isn't as crude as O-Swing%. Though there I think not swinging at balls is a lot more cut and dried.
Just on that Orioles page though, If Sisco and Stewart are discerning the right strikes, and only trying for those, their Chris Davis-lagging 75-ish Zone Contact percentages don't exactly shine.
You or I could post a 0.0 O-Swing%.