We are talking about a ceramic piece that might be close to 1000 years old. Next thing also involves a loupe. I would like you to study the small air bubbles you mention are enclosed in the glaze. They should all be of different sizes, different shapes and unevenly distributed. The uneven temperatures in the old wood fired kiln caused this to happen.
Modern glazes have much more evenly distributed bubbles.
As I said - opinions are most welcome. If someone tells me, Yes, Sure, this one is quite ok. It still looks like a Jingedezhen piece to me, and the date to be decided. In Januari 2001 this comment arrived from a friend in Hong Kong which to me makes most other comments unnecessary. Maybe also the group which is availibly in the largest quantities too, probably because they have been so much sought after.