Pierre Buhler says Citigroup (C) did "much better than I expected" in its earnings. However, he shares caution with Citi's and Bank of America's (BAC) CEOs expressing more optimism on the economy's outlook compared to JPMorgan Chase (JPM) CEO Jamie Dimon. Jed Ellerbroek agrees that headwinds are coming but adds that any modest growth seen in bank earnings for now should be considered a win.