Yeah, I read her book and I am not striving to be her.
I'm impressed that you see the problems with this despite your child being the one singled out for praise. You're right that it will also have effects your own child - both in creating envy and resentment with peers and the risk of your child's personality being one that causes a negative reaction to public praise pointing out that they're different and better.
I found it interesting that DD did not mention the grade or the public acknowledgement to me. After the embarrassing conversation with the other parent, I asked her how she did on her math test (we had studied a bit the night before) and she said, "Fine." Fine? "I got an A." I hear you got a 100%. "Who told you that?" She seemed satisfied about the grade, but clearly sheepish/bewildered/weirded out by what had happened. I need to talk to her about it again, perhaps.
Good grades ARE valued and admired in her current school. Culturally, it's different from a regular public school. However, I feel like that can only go so far.
