I don't know. My R/T was like that too - all the American Challengers ship from Brampton with the DRLs turned off, whereas they're left on for the Canadian-destined cars. My dealer had to enable the DRLs with StarScan. Fortunately, my dealer knew how to easily do that. Not every dealer does, sadly.
I'm guessing mine must have been built with DRLs enabled, since I never asked the dealer to enable the DRLs on my Journey, and she was only on the dealer's lot less than 24 hours - drove in from an area dealer to my dealer, prepped, and delivered the next day.
Really like the extra visibility the DRLs give me during the day - every little bit helps in traffic. Not to mention they look cool too.