The voltage soon after charging is higher than it will be some days later. I have just checked some Sanyo and Ansmann RC packs that were all charged 3 weeks ago and all showed between 1.29 and 1.31V / cell. I did a discharge test on three packs and all gave the correct capacity. If you check the voltage immediately after charging, it will of course be higher and that again depends on whether you fast charge or not.

So my answer to Ady is it depends on when you make the measurement after charging and not doubting what others are finding, depends on the manufacturer. I would not return a pack just because it only has 1.28V / cell, I would do a discharge test. In fact I had a batch of RC packs that still showed over 1.3V/cell yet could only deliver about 30% of their rated capacity.