It's a huge waste of your time. They say they're conducting an opinion survey about health coverage in California. What they really do is subject you to about 30 minutes of advertising for Covered California. If these people call you file a complaint with the FTC (do not call list) and the California Insurance Commissioners office.
I called them up. They claim to be a research firm in Chicago that has been contracted by the State of California (Covered California?) to do opinion gathering related to affordable health care. I