There seem to be a few cookie-cutter profile groupings out there, remember noticing one where quite a few girls had almost identical descriptions including the same typo in the word courteous. No idea if it's that there's templates suggested by EI or some other resource, that maybe there's someone they trust to create/manage their profiles or some other system, there are many innocent possible explanations.
Maybe they came over together and are rooming together/nearby one another so they can look out for each other.