Angus Young: any evidence of USX/DSX/DBX from live footage?

Playing Technique
#1

Hi everyone — I’m trying to figure out how to describe Angus Young’s picking in CTC terms.

Question: From the best available footage, does Angus look more like USX, DSX, or DBX (or “mixed / changes depending on phrase”)? And what primary motion does it appear to be (wrist / forearm / elbow / blend)?

Footage (timestamps):

  1. https://youtu.be/n_GFN3a0yj0?si=4-rmC6dIMUbiGqZH — 0:22–0:27

  2. https://youtu.be/IGoPNp_WumE?si=sbF05jHnGmnn-zBn — 2:40–2:50

  3. https://youtube.com/shorts/ktFGr9WnY98?si=jfGdoLHv7NFtQd7p

What I’m noticing (but not confident):
• A lot of his vocabulary is pentatonic / 2-notes-per-string-ish, which makes me wonder about USX compatibility, but I don’t want to assume.
• I can’t tell if he’s doing a consistent escape, or if it’s more “whatever works” + occasional legato.

What I’m hoping for:
• A best-guess escape type (USX/DSX/DBX) based on the clips.
• Any telltale signs (pickslant, arm setup, visible lift on a certain stroke, etc.).
• If you think it varies, a quick note like “these phrases look USX, these look DSX/DBX.”

Thanks — even a “not enough info from this footage” answer would help so I know what to look for next.