I was at Shanghai Disney yesterday. It isn't the beauty of a different culture...it is simply rude behavior. I saw people leave garbage on a rail when a garage can was 25 feet away. There is almost zero respect for your place in line...if you don't crowd right up to the person in front of you, the person behind you will pass you up. A common practice is for one person in a group to get in line while the rest of the family does something else...then the rest will work their way through the line to join the rest...most of the rides have signs that say that your entire group should enter the line at the same time.
I was in the single rider line for Tron where the posted time was 30 minutes but it ended up being closer to an hour. Two Indian men kept trying to pass me in line, actually pushing me at times. When I made it to the front, they tried to tell the CM that they were next and that there were two of them. I stood my ground and the CM believed me.
Chinese children are probably a little more spoiled than American children. I saw several occasions where 6 or 7 yo kids just yelling at a CM or a cashier. Without admonishment from their parents. Their children are encouraged to duck through rails, or are even lifted over them, so that they can play with the scenery.
The rude behavior DID take away a little from the experience. It made waiting in long lines a bit worse than it had to be.