Roughly 462,000 people signed up for ObamaCare through the federally-run insurance marketplace in the first week of the 2015 enrollment period, the Department of Health and Human Services announced Wednesday. That tally doesn't include the tens of thousands of customers who are estimated to have signed up through state-run exchanges.

The flood of early enrollments is a far cry from last year, when a sputtering website hindered enrollments and gave Republicans fodder to bash the Affordable Care Act as hopelessly broken. The administration hopes to enroll between 9 million and 9.9 million people in new insurance plans during the second open enrollment period, which runs through February 15.