SSAT scores as a method of BS selection

I have a good friend whose daughter fits this model and is very happy. Math, science, language, and some history classes were all leveled at her school starting freshman year (honors or AP classes were offered). English and other history classes did not have honors or AP sections until Junior year. The one class in which she was very bored was a sophomore English class (she loves English and writing), in which she thought the discussion level was very poor-- but Junior year is much better again, as she is in AP English. She’s pretty grade-driven, and will work very hard to get a “high A” (97 or 98) rather than just a " middle or low A." Because she’s mostly in classes with other high-achievers, her friend group over time has morphed into a group of other high achievers (I don’t think she intentionally sought out those peole or excluded others-- it just happened over time). The school seems to be able to challenge a very broad range of kids. Anyway, this is just one anecdote, but she is very happy and continues to be challenged-- but, as I said, she’s pretty grade- driven and hard working, so I don’t know if she would have been as challenged had she had a different personality.