YMMV, but today I canceled and requested refunds for two awards that I made about a week ago; both sets of miles returned to my account within a couple hours. Flip side of that is an award that I made pre-3/3 ticketed on 005 stock; I requested a refund 3/23 and still haven't seen those miles. Thankfully, only 12.5k so I'm not too stressed, but it'd be nice to have them back so I don't have to keep track of them.