Although Bromstad “personally loved” Southland, she has no regrets canceling it. ”It probably found a better home on cable,” she said.

http://ausiellofiles.ew.com/2010/01/10/office-heroes-law-order-press-tour/

It'll be treated better there that's for sure. NBC obviously doesn't remember how low rated Cheers and Hill Street Blues were before they became hits. NBC is in 4th place. They have to give their shows time to grow.