I flew NRT-ATL on DL (NW) 800 last month. Menu and food was standard BE (I understand all flights ex-NRT have the standard menu now). One of the selections was the Japanese meal (which was also offered on DL 55 ATL-NRT outbound).

Service was OK, just different from DL "BE" service, as carts were used. Food was of the same quality.

I was upstairs, which is a nice ride, although the seat was not as comfortable as I thought it was going to be (lie flat at an angle).