I'm with you 100%. I've been beating this drum since we learned of Ford's non scientific formula being used to determine who receives and when delivery will occur.
As long as the deposit is refundable (many states have a law regarding this) I have no problem with providing a larger deposit. It will potentially stop many like myself who have placed multiple deposits from moving forward if X,000 deposit is required in addition to those who may move forward...
Most Chevrolet dealers require anywhere from 1k to 5k down (refundable) at reservation and then 5% down on your total m.s.r.p at the time of order. This helps keep the conversion/order numbers accurate.