I think you've summed it up perfectly

 

Excellent point!

 

What if PickupTruck.com and TMS are both right?

If you look at the PickupTruck.com article, it says to look for the 5.0L TT in 2012 - not necessarily MY2012. What if it's CY2012 (MY2013)?

If you combine this timing with the 2011(CY) Mustang end of life cycle thread, that could mean the GT500 gets the aluminum block for MYs '11 and '12 in CYs 2010 and 2011 as all the speculation suggests thus concluding the modular engine in the Mustang. We've seen two year runs on engines and Mustang variants - the 2003 and 2004 Cobras and MACH Is - the last two years of the SN95.

Meanwhile, the Mustang GT gets the coyote engine starting in MY2011 and the SE Boss variant gets the Road Runner (beefed up Coyote) in MY12 (if not sooner). These engines could carry on into the MY13 Mustang redesign in CY2012. OBTW, the Shelby / Ford agreement is good until 2013 at least. So I'd expect to see more SE's of that variety as well.

I know it's not the most solid of theories, but I think it's the easiest way to explain all the different source reporting.