Are you sure you have enough data to make 1) a fact ?
I doubt that anyone but very, very few, writes resumes in TeX. LaTeX, yes some. TeX ? Nah.
Someone in command of LaTeX, can make a CV look essentially like whatever they want, so 1) is perhaps not as "usually" as you think.
Regarding 2), what, if anything, do you conclude about an applicant's level of geekiness if you believe you have identified their resume as having been written in Word ?
If you really use this strategy and you are a hiring manager in an area related to technology or computing/programming, someone should seriously consider if it is to their advantage having you involved in the hiring process.
I doubt that anyone but very, very few, writes resumes in TeX. LaTeX, yes some. TeX ? Nah.
Someone in command of LaTeX, can make a CV look essentially like whatever they want, so 1) is perhaps not as "usually" as you think.
Regarding 2), what, if anything, do you conclude about an applicant's level of geekiness if you believe you have identified their resume as having been written in Word ?
If you really use this strategy and you are a hiring manager in an area related to technology or computing/programming, someone should seriously consider if it is to their advantage having you involved in the hiring process.