Yes there is truth to both. You will get singled out/ridiculed and be relied on to fill certain "head of household" positions. But so will the big guys (they typically become Master at Arms) and guys of certain heights will get picked to carry the guide on (Flags), etc.
I got picked to be Medical Yeoman.......that should read sick call B****. I got to escort sick folks to Medical for everything (since NOONE goes anywhere to do anything without permission and a request chit. When I mean everything I mean constipation, STD's, mental "anquish", refusal to train (didnt want to do anymore arm circles), blisters, in grown toenails (some of the worst sights I can remember), cant stop pissing the rack, cant stop shi**ing the rack, cant get to sleep, cant wake up, broken bones, and a host of diseases, viruses, and sicknesses that will breed in a compartment full of stinky dirty mostly adolescents.
You will get picked for these things because it is felt you can miss lectures and class while escorting some of America's finest to and from Medical and still make a passing grade.
Funny but true story:
First night we arrive we get the customary "you are the worst bunch of 'cruits I have ever seen" speech. Well across from me is this Chinese kid who cant speak a lick of English and has one of these pocket translators. So as the RDC (Drill Instructor) is walking up and down the compartment yelling and swearing, every once in a while you can hear this computer translating english to Chinese......like for example "F***in' shipwreck" pause......and something in chinese is spit out. Well the RDC thinks someone is making fun of him and repeating what he says. Eventually he finds the source of this racket, picks up the tranlator and throws it against the wall. It breaks. That kid never made it a week. In fact I escorted him to medical for refusing to train, and he was picked up at the train station outside of RTC/NTC naked because as he made his escape (he tried to run away) somebody mugged him. Cold, naked, cant communicate, broke......I think his recruiter probably won a NAM for that one...Not!