Nope mine was bought at a Canadian dealer. I would expect that as well as all my other cars have the DRL's turn off when lows are put on. At first I thought they were the fogs but I never turn those on. The DRL's definitely get dimmer once the lows are turned on that's for sure, but they are still on. In some of the other pictures the US guys have posted, the DRL's are referred to as "City lights" and you can see them turned on both when the car has the lows on and off. What I'm thinking is that the US cars have them equipped as well. Mine do of course turn off when the handbrake is applied, this is mentioned in the manual as well.

Have you gotten your G37 yet? if not take a look when you get it and let me know how your's turns out.