I figured they just slipped on compressed air masks (not O2, as humans can't subsist on oxygen alone) after their readings showed that the temperature and pressure outside of the Falcon were indeed survivable, regardless of why: they might have been generated by the ship, or the slug, but they didn't need to know the exact soruce.
Anyway, nerdliness aside: the link in the blog links to a search query for "Han", and at the moment, this only shows the PF figure and its exlusive. Once the 12" Han is added to the site, the query will show it as well. So Sideshow won't need to update link in this blog entry. That seems to be all.
Oh, and it's not the PF sculpt. They do look very similar indeed, but you can see the difference, mainly in the hairstyle. I agree that PF looks very Harrison-like from the front, but the profile view is a bit wanting. Hopefully the smaller 12" will be an improvement in that regard.
I wonder who sculpted it -- Andy or Matt or someone else?