Not sure I'd believe this either, unless this is specific to Wake Forest SOM. I've heard plenty of people get invites many months after submission of their secondary (though maybe Wake Forest does it differently). Usually it's mostly people with very high stats who are receiving multiple interview invites this early. The rest of us mortals have to wait it out until October-March to hear back from schools about IIs.
Of course, this doesn't stop me from obsessively checking my inbox every couple of hours...