GirlWithTrowel alludes to working under a press embargo. One woman's blog is not proof of much, however, press embargos are BAU for NASA missions, PIs get a year to publish before the results are public, however media coverage disappears a couple hours after mission events. So at least in mass "push" media, the data is never distributed beyond occasional PR team low res footage.

It would not be surprising if press/publicity stuff works the same for archeology missions as NASA missions, after all they're all academia employed PHDs trying to get published in journals, so convergent evolution and all that.

All the data is eventually released "somewhere" usually on a public website, but it takes awhile.