I suppose dropping out quickly isn't necessarily negative - it depends on the reasons. If the student realises that they hadn't really realised what the course involved, or just decides they'd prefer to do something else, it might be all to the good to drop out asap. If it's due to accommodation issues, or not settling in socially straight away, or even that the course is not as described, that is much more of a negative experience.
Hope your ds's friend is not too down about it Piggy, and finds something else rewarding.