The dealer I ordered my Daytona R/T from did not ask for any deposit. He said he was confident he would be able to sell the car even if I changed my mind. Regardless of the dealer, I wouldn't think a very large deposit would be required.
No deposit (yet). When the VIN is assigned, I'll need to put down $500-$1000 to "keep it." Considering the delay and my infinite patience (ordered May 16), I doubt he thinks I'm walking away and won't ask for the deposit.