Thank you Tzippi, I agree with you completely.
The difference between the boy’s freezer and a (potential) girl’s freezer is that the boy’s freezer is one yeshiva that decided to create a rule. That yeshiva became very popular amongst boys of the age that are ready to get married, but it is nevertheless only one yeshiva. Girls do not have that. It would need to be universally accepted, and even then I don’t think all girls would follow it. Besides for that, it has only dubious success (sorry, AZ, I don’t agree with you at all).
And is it a good idea for girls to start getting married later? It is brought down that a man should marry his daughters off young.