“Gustavo Dudamel is a musician of precious and precocious talents.” He’s also Esa-Pekka Salonen’s designated successor at the Los Angeles Philharmonic, and caution is in order. “The crucial thing is for Dudamel to be given time to mature naturally. … We as music-lovers must respect the fact that, however excited we might be by his infectious bonhomie on stage and his undoubted rapport with orchestras, he has not attained his full heights at the age of 26.”