[tasogare]

Also "LaTeX look and feel" doesn't mean anything to start from: Latex documents look vastly different depending on which template they use. A lot of conferences and journals allow for both Word and Latex files to be sent, and it's impossible to guess in the output which tool was used to author a given paper.

[jimhefferon]

Yes, LaTeX documents could have many different document classes. But many, many authors stick with the defaults, which a person could as a shortcut call the "LaTeX look."

[choeger]

I am convinced if you give me a Word and a LaTeX paper from the same conference, I can tell you which one is from the typesetting tool and which one from the word processor.