Here's my experience from this morning. I park in a garage, so upon startup at 6:30am, the temp reading on the dash was 0c. I let the car idle for 30s or so, then pulled out of the garage and started driving to my in-laws to drop our daughter off for the day. By 6:33am, the temp reading on the dash was -12c, and it stayed there for the rest of the drive.
I see no issue with it, but if it concerns you, raise your concern with the dealer to see if there's anything they can do.