I had my grey shipped 1500 miles to me when she was 9 weeks old. I had to pick her up at the cargo part of the airport. The attendants tend to terrorize the animals. They sometimes like to put a cat carrier up against a bird just for fun, which is what happened to my bird. Left there for about 45 minutes.
As far a physiological affects, There really is no way to know when first getting a grey. You would probably have a better idea if it was your grey to start with, and you shipped it and was there to pick it up.
Temperature is very important when shipping a bird. It can't be too hot, or too cold.