I'm in for the challenge and have a 28 minute queue if anyone wants it.
I went back in to try to buy the Baymax shirt but the store won't let me check out. :/ I guess I should appreciate that Disney is not letting me spend more money.
My guess is yes. The runDisneyRun facebook page has a dedicated post for talking about registration, and it only has 5 comments so far. Usually it's full of people complaining about more than an hour wait times...