The San Francisco Symphony program was a bit of an odd one. It was not bad, certainly, but was strangely bifurcated, veering from some rather fluffy 19th-century French music, by Litolff and Adam, to major works by Chopin and Debussy. Under Michael Tilson Thomas’ direction, the orchestra sounded grand in less than grand music, as well as in works of substance; and piano soloist Garrick Ohlsson was magnificent in everything he touched.