I'll bet Ford left a lot on the table with this motor, since they changed the internals so much.
I agree with this statement completely! Within the next 2 years, they'll see the real street numbers and raise it to new 450hp without actually changing next to anything. Just like the oil rings from the 2011-2012 models etc.
These strong internals on the 2015 will hold more FI boost and raise the bar a little on safe operating HP levels due to mods.