I submitted all of my secondaries in July and the ones that I have heard back from (~63%) got back to me within 1.5-2 months. The fastest was 2 weeks. Some have reported 24 hour turnaround on some of the school specific threads. But the true answer is right in your OP: anytime between now and March. Don't read too much into when you hear back or don't. Hopefully sooner rather than later! With an 81 LizzyM and a well-rounded app you should hear back from many in September.