Is this advanced speaking for a 2 1/2 year old?

It sounds perfectly normal to me. she obviously has a good vocabulary but it's not exceptional. My two sons started speaking really early. The eldest son pronounced his first word at eight months and was a very advanced talker at the age of two and remains to this day exceptionally gifted for languages and literature. He is really bad at maths however. Every child is advanced in one way or another in certain respects, and at different periods during their growth. It's a very individual thing and it's wonderful to watch their development. Your little girl probably enjoys words and language and she should be encouraged in that direction.