Argh, no fast track sucks... That's one thing to say for DL Sky priority....
Yes, I agree it is much shorter than anything I do tend to get when I have a choice (at least 2h30 or so) for a US intl -> domestic transfer, but in this case, there was no choice except paying more to fly WT than I effectively do to fly WT+. Hopefully there will be no problem and if not I guess they will have to put me up for the night at ORD. Return is a longish connection of nearly 4 hours so I mostly hope the ORD BA lounge is good!