Ace Metrix, TV metrics and analytics firm based in Los Angeles, has received $6 million in its second round of funding, led by Leapfrog Ventures.Existing investors Hummer Winblad Venture Partners and Palomar Ventures also participated in the funding. The company’s new online service launched in June this year, and says has customers such as Nissan North America, Mercedes-Benz, Microsoft (NSDQ: MSFT), HP, CBS (NYSE: CBS) and others. Its technology helps advertisers and agencies get feedback on the effectiveness of their TV ads, in real-time, online. According to this LAT story, the firm’s subscription-based service ($100K a year and up) diagnoses every new commercial that hits the airwaves, using 500 online respondents managed by a third party; the results are fed into Ace’s algorithm that then produce various likability scores. Some more info here.