I'm not sure walking around in them will mak much difference as, generally, we walk much different to the way we run. Go for a few short runs (a weeks or two worth) with a day recovery inbetween; if the still hurt you then bin them.
As an aside; I found the 9's to be very, very, very slappy. I just don't think it knows what it's supposed to be. It's got the drop of a minimal shoe but with loads of cushioning so it's really hard to land your forefoot before the heel, you end up either striking with a flat sole, or revert to heel-toe. Probably he crappest shoe I've ever run in......just my opinion mind.