I check the update post every day, there are plenty of LVL 2 trucks with later VIN's than a lot of us that are being built, so I don't think its LVL 2 causing delays.
I am convinced the assembly managers get together every morning, have a cup of coffee/tea and throw darts at a board with VINs and build them that way. No rhyme or reason 400 series vins are being built before the 200's - I've seen some build sheets and window stickers of fully optioned out TRX being built before others who have been waiting months longer.