Let's be careful not to make this a binary proposition about extroversion/introversion. Extroverts can be blenders, too, if they have a strong dose of agreeability. My DD scores strongly on both, and that's how she started slipping in under the radar. I got more attention at her age despite less extroversion largely because my agreeability was SIGNIFICANTLY lower than hers. If a lesson was below me, I did not feel restrained in displaying my contempt.
Post grade-skip, DD continues to blend, which in this case is a good thing.
