I don’t think anyone can furnish any ‘proof’ for any of the assertions we’re throwing around here. Just strong anecdotal evidence.
Of course, if you’re just staying there for your ‘name’, but really are waiting to leave, no difference. But otherwise it might make lot of sense. If you set a tone in the house, a certain routine where Torah is supreme, so that atmosphere can more easily continue despite spending much less time actually learning. In addition, the difficulties in college or the workplace are presumably easier to handle when equipped with the “shemira’ of being married and the stability of the home.