Sure it can be used, but the question is if you just let the bees do their thing, without interfering in that step, which queen would have hatched first? Would it be the caste queen? Would the caste queen be the best quality queen you could get?
It is possible to say that if the bees start rearing queens 24-72h after removal of the queen, that in hour 1 they select a larvae that is 1 hour hold, and in hour 65 they select a larvae that is also 1 hour old. The other studies, however, indicate that they take a broad brush, and select larvae of multiple ages, rather than the youngest.