Here is a good website if you are interested in Ameraucana breed standards and information: www.ameraucana.org.
It is a rare breed with very strict standards of breeding. It is highly unlikely that you have picked up a really rare purebred mixed with a bunch of EEs (mixed breeds). Is it possible? Perhaps. It's also possible that I'll win the lottery that I'm fixin to enter this week, but I'm not going to quit my job and count on it (but I'll hope really really hard!).
I personally think EEs are a bit more fun than Ameraucanas because of their mixed nature. You just don't know what color skittle they will turn out to be, and sometimes you get 3 skittles worth of color in one!