Some kids it may be hard to tell until they are older, but almost anyone who carries on a conversation with my daughter for any length of time, or just watches her carefully will see that she sees the world extremely clearly.
I love this. Do you converse with typical 2.5 yo a lot? You may realize that not many of them actually carry on a conversation, let alone one in which they show how clearly they see the world.
I can only reiterate the suggestion of staying away from traditional preschool academics, and to try an create multi age environments for her as often as possible.
If you want to try to make traditional k - 12 school work, I am also a great fan of the "stealth acceleration" that is early entry. You may want to find out about your districts criteria for that one now, in case it turns out to be a lengthy process or you need to go the private school route.
