I have heard some say that right now, the savings rate is at an all time high. There are also surveys that suggest that Americans plan on spending more on Christmas this year than they have in the past. If we don't have a crushing peak, I would think that volume will fall a little, but not a lot in January/February.
Right now, there are lots of things that people want, that are not in stock. We don't deliver many of those items (think appliances and furniture,) so there is that too.
If we over-hired, in my building, it was not by very much.