Super miscommunication.
I think what
@ridethecliche meant was he thinks School A should not have access to other acceptances unless School A has made a decision (i.e. post-interview?) on the applicant. In other words those schools that don't release decisions until the first week of April who theoretically could see an applicants standing elsewhere before making a decision. I think
@gyngyn interpreted this as school A should not have to wait until after a decision to see an applicants other acceptances (i.e. what already currently happens in April-ish). Hence "[they] don't [have to wait]".
That's how I read it, but maybe you both meant something different. Would it be unreasonable to just use the same match system that residencies use?
That way the whole idea of "intent" is pretty obvious and schools get the best applicants who will actually attend.