…as witnessed by this paper (and many more) I found linked on Heise Security.
It's declared a tech report and not published in a specific journal, so I imagine they could have used Word. We have to ask ourselves: are the Microsoft Research employees a bunch of faithless renegades?
I think not - because this is a pretty appalling example of LaTeX layout: A strange mixture of Computer Modern in the document body and Helvetica (?) in the section headings, capitalised headings, crowded pages, orphaned lines, horrendous bad boxes…
If this is an informal pre-print, I concede the orphans and bad boxes, but deliberately choosing a document style this ugly?
Now that's what I call partisanship.