Everything else that has ever been said indicates that the report will be out in 2013. If you look carefully , (;)) you can find some Abelson quotes on the web discussing this.
MIT has clear commercial reasons for wanting to defer until after admissions, and possibly until the end of the 2012-2013 year. Releasing it in the summer actually is a more effective way of burying than releasing in 2014, so I guess what I mean is "released after the end of the 2012-2013 academic period".
MIT will be empty (sort of), everyone will be distracted by something new, and it won't affect admissions.