ST. PAUL, Minnesota — After more than a week in action, is a key feature of President Barack Obama's health care overhaul a success or a bust? Judging by the dearth of data, it's virtually impossible to say.

The federal government has released no comprehensive data on how many people have enrolled for health insurance using federally run exchanges, the online marketplaces being used in 36 states for residents to compare and buy insurance. In the 14 states running their own exchanges, the situation isn't much better.

Officials with California's exchange say it will be mid-November until they can say how many people signed up. In Oregon and Colorado, the official number of completed applications is zero. And in Minnesota, which billed itself as a leader in implementing the Affordable Care Act, officials won't release data until next week about the number of applications started and completed.