Full Disclosure: I'm not certain who 3minus1 is, but I used to work on the project he/she works on.

There was content at Healthcare.gov prior to 10/1. The applications that delivered the content to the site had very similar function to the ACA application. Intaking consumer information and outputting potential insurance options. Also, gathering insurer data to do this. Not a full prototype, but damn close. I like how CGI Federal is taking it in the teeth when there are a number of contractors who worked on this. QSSI, Experian, Etc.