Banks are finally beginning to lend, the big ones that is. Commercial and industrial lending is up this quarter 0.2% from the third quarter, according to Moody's Analytics. That might not sound like much, but it's the first quarterly increase in two years. This is great, right? After all, if banks are lending more to businesses, they can expand and begin to hire. That's true, but this trend reveals something else: the financial crisis has created an environment where big banks are getting bigger, as the small ones struggle.