I've had an order "placed on the waiting list" for the first dealer since early August for a 22, and they had about 12 orders ahead of mine that were rollovers from 21s. They said once they get allocations and are able to actually submit the order, they will need the refundable deposit.
I told the dealership I went to today before we even started the process "just so we don't waste each other's time, I am not going to put a deposit down now, due to all the contrainsts. As soon as there is allocation and GM picks up order I will give you whatever deposit you want". He didn't know off hand how many orders the dealership as a whole had waiting to be submitted, but he said he personally did a couple.
I have one placed in the outskirts of the metro area, that has multiple dealerships and seem to have had higher volume 21s come in throughout the year. The other is in a more wealthy area, and I was kind of surprised when the sales manager said they do have a super high volume yet you see a bunch of 15-20s around town driven by the executives and soccer moms.