Speaking as a former model student and teacher's helper, I would be very concerned. If being an outlier (more mature than the other kids, more advanced academically, the person singled out and favored by the teacher) becomes your daughter's identity, then she might feel threatened rather than stretched when she finally encounters real academic peers and competition (somewhere around law school in my case) and fail to rise to the challenge. Rewarding and praising someone for their maturity is like rewarding them for their innate smarts--it doesn't encourage hard-work, risk-taking or growth/development and might even discourage those things.
