Is this a Philadelphus coronarius?

[CooperT]

Trying to identify this. Dug this up with a bunch of quince from my parents front yard 2 years ago. Thought it was a quince when it was small, but looks more like a Philadelphus coronarius (mock orange) now. Parent's had a few nearby, so wouldn't be surprised if this was one. This spring it's been growing pretty strong. Please excuse the blurry pic of the trunk. It's rough bark with a lovely jin, but quite narrow at the moment...

Thanks for any input.

Tim