IMHO the most likely destination for McKenna is that he stays at Stanford. Remember that the original RUMOR was (and this quote may not be exact)
"SOURCES say that McKenna is CONSIDERING transferring out of Stanford".
I hear you NoVa, but if he is visiting other programs, my gut tells me he is committed to making a change.
n = 1 example of the day*: I'm of the personality type that when I am sufficiently dissatisfied with something to start considering change, my mind is made up to make some sort of change, regardless of the options available. Especially once I invest effort in evaluating any of those options. The grass is always green enough on the other side once my current commitment has faltered.
* Disclaimer: I am not Joey McKenna.