My 470's stock voltage was 0.925 and would run stock clocks at 0.887. That was on a gf110. The gf104 is an improvement i see no reason to doubt he got a good card.
Also i GPUz is fine he was also at 100% load with voltage regulation disabled in AB. Meaning he hadn't touched it and it was not at 2d clocks.
Tell your friend congrats on the awesome card