Brian
You are spending too much time in Philly if you are questioning whether they are real americans picking grapes.
Making wine is an art. Science can only get you so far. You gotta have the right dirt, the right weather, the skill in tending the vineyards and so much more. That is what I love about wine. Its chemistry, farming, geology, meteorology, experience, art and love all wrapped up into one big bundle of fun.
China is a huge country and the idea that all the right conditions could come together in some part of that country is not shocking. Then bring in a skilled winemaker trained at Chateau Palmer and you have a great wine in the making. This is not simply some one in a lab cooking up great wine. It is some much more than just science.