.  . .  Escaping is by definition outrunning your opponents.
Escaping or repositioning?  It is a fact holding to the observer or the doer with distance being the variable in question.  If I try to follow a Spit in a tight turn is the Spit escaping being shot or repositioning?  Both would fit the situation.  
I am not a big Mustang fan but they do seem to get beat up on this form and on the vox for taking advantage of an attribute of the plane.
I heard a young, cocky vox user last night complaining about a single red hugging the ack cover when they were ten, uncontested, greens circling overhead.  The red guy was playing the hand he had.  If I can survive by escaping to the ack I will.