Right now I'm not picking up any Fedex flights headed in that direction (or any direction, for that matter) from DFW. This probably means that Fedex will schedule some flights later this afternoon or evening, but has not yet announced its final flight plans.
For some reason, Fedex doesn't seem to have worked out its connecting flights very well for that hub. Anyway, if I were you, I would monitor for a departure scan through the mid-evening. That would still give Fedex sufficient time to get your iPad onto a truck for a Saturday delivery.
I was one of those in the KC area from yesterday. They did truck ours up last night and delivered them today. The truck yesterday left about 1:30 and arrived in KC about midnight, in plenty of time to deliver today.