Agree strongly - the top 10 list I posted a few months ago on the "Best performance by a child?" thread is as follows (not in order of preference):

1. Bjorn Andresen (Death in Venice)
2. Jean-Pierre Leaud (Les 400 Coups)
3/4. Gaspard Manesse/Raphael Fejto (Au Revoir Les Enfants)
5. Benoit Ferreux (Le Souffle Au Coeur)
6. Pierre Blaise (Lacombe Lucien)
7/8. Bertil Guve/Pernilla Alwin (Fanny och Alexander)
9. Wojciech Klata (Dekalog 1)
10. Kolya Burlaev (Ivan's Childhood)

I suppose it may have changed since then, but off the top of my head, nothing yet.