challada, I'm not going to flame you but rather applaud you. I've never been to AG in NY but I have a couple of friends who have brought their daughters there and loved it. Yes its pricey but they saved up for it as it would be a one time deal. From a PR point of view, there's no reason to publicly make a spectacle of this situation from either side. This should be done on a one on one basis. If the mother had a problem or felt that her daughter was treated badly then maybe she should have asked for management. Her letter seemed overly dramatic but then again there are people on the internet who thrive on it just to get attention. Plus it just seemed like it was an issue with that ONE employee and not the company as a whole. I am sure when the letter gets filtered through the company that the employee will be reprimanded in some way but probably not drastically as some people would hope.
Disney is notorious for this. I should know, I'm a former CM and my husband is one as well. They provide CMs with generic scripts when it comes to guest complaints and in many cases, they are not sympathetic to your situation especially if its presented in the manner in which the woman wrote that letter in. We were trained to filter all legitimate concerns over those that were just trying to get something free (ie. ticket reimbursements, front of line passes, free meal, free something or the other).
Lastly, Mattel is the parent company of American Girl. If anyone is so upset, then maybe you should either take it up with them (they're in El Segundo, CA) or just avoid all Mattel products...Fisher Price, Hot Wheels, Barbie, etc...and even several Disney and Pixar toys.