Unfortunately, I'm afraid you could be right and trucks on the assembly line now could very well see dealer lots before those of us with earlier build dates IF they have the parts to complete the trucks on the line simply because its easier to build trucks on the line than it is to rework already built trucks that are parked offsite. I'm sure they may also work on the trucks already built while new trucks are being built, but at a slower rate than those on the line. Like most everyone else on here, I'm just guessing though.
For the record, my blend date was 10/20 and my truck was "produced" on 10/23, but on chip hold. I'm assuming my truck is on the storage lot of doom along with all the others.