I'd say they're actually pretty responsive. This thread only started on 6 April. Several people have come into here (and the other thread) with their own reported failures, 7.62Kolectr has confirmed several where he works, I've seen reports from other dealer staff, and I've seen several reported on the private Facebook group.
By 1 May Ford came out with the advance notice letter to dealers, recommending no more demoing or delivering hybrids with VINs tagged as questionable, both US and Canada. The original US letter called out a late June Dealer Bulletin target, but they revised that to significantly earlier, mid-May. It takes time to do investigation, figure out if these are a couple of outliers vs. something more widespread - getting from the initial failure (that was reported here, at least), to the 1 May letter (which would have gone through internal review) in under a month is a good pace.
The above timeline is hardly foot dragging. We may wish they had loaners for everyone, right now, but their overall speed of response, reaction time, seems pretty solid. Of course we'll have to see what the fix is (hopefully sometime next week, but I wouldn't consider it terribly late if it doesn't happen until the following week), and how capable they are at fixing delivered vehicles rapidly.