Sure, you can believe them that 7.5 million have enrolled. It comes down to how you define 'enrolled', which the government defines as "someone put an insurance choice in their electronic kart." That would be like CDW saying they sold 100,000 LaserJet printers, just because someone placed one into their basket. The reality is that that majority of the insurance plans placed into the insurance basket was never completed. And of those that did complete the process, many never paid their first premium, which ultimately gives us a much smaller number of ACTUALLY INSURED people via ObamaCare.
And how many are actually paying and thus covered? Less than 1 million.