In my channel surfing last night, I hit Great Performances, a series I usually find wildly misnamed. The Mostly Mozart Festival was playing some piano concerto with the young Chinese pianist Lang Lang as the solo. I was enthralled. It was the best Mozart playing I've heard in quite some time. And then, of course, I found out he wasn't playing Mozart, but the Mendelssohn first piano concerto. I've long thought Mendelssohn's music got a raw deal, but not when it came to his piano concerti, which always struck me as providing fodder to those who considered Mendelssohn a flyweight. But WOW! Lang Lang sure changed my mind. He then did an encore of Liszt's loopy, knuckle-busting Fantasy on themes from Don Giovanni, in which he showed that he had the requisite ten fingers (including thumbs). It wasn't the most musicianly Liszt I've ever heard, but I didn't really care. It had all the spectacle of Motorcross racing. For those of you more attuned to the current classical scene than me, I ask whether Lang's general rep is rapturous or mixed. Steve Schwartz