Well, I had a P613S, and it weighed 7.6lbs for me in a size Large. And HH121 purchased it from me, and he is probably the most focused on weight of a jacket than anyone I know (I can understand how it can be used as a metric) and I don't want to put words in his mouth but it weighed for him 7.4 pounds.
I don't think any of us have a calibrated scale, but in this realm a pound does make a difference when you are in the minutia of leather studies and can lead to confusion for those that have the experience to understand the difference.
7.4lb for a size large sounds a lot more realistic than 8 to 10lb for a size small... That was my point.