One key area where Facebook lags is in ad products that take advantage of real-time TV interactions. Twitter is actively focused on creating such products.
Even so, marketers surveyed by Advertising Age and RBC were more likely to use only Facebook than they were to use only Twitter to advertise in conjunction with a TV campaign. While 12% of respondents said they had done so on both Twitter and Facebook, 7% used just Facebook, and 2% used just Twitter. Read the rest at eMarketer.