[legolassexyman]

Seems like an exaggeration. I really doubt there's anyone taking realtime notes in LaTeX.

[preben]

It's totally doable. I type fast and know my LaTeX. Only time I feel like I'm at a significant disadvantage is when new symbols are introduced that I have to look up.

Only math is done in LaTeX, for clarification. They're rendered as images and imported into OneNote (via EqualX, if anyone's looking to do the same).