It looks a bit weird, but I think what we're seeing from this angle is a) the slight curve to the top surfaces and b) tracks for mounting a roof rack. The combination almost makes it look like it's not attached.
People like working at Tesla. It's the #1 most desirability destination for engineers, for years. Sometimes #2 to SpaceX. These people take pride in their project, and don't want to risk their jobs.
And really, if you've seen it, why do you care if other people do?
Tesla's cold testing is done in Delta Junction, Alaska:
A "secure facility". So yeah, if there were betas built for testing at the of last year, some were sent to Alaska.
Yeah, there was the Alaska story from way back, but then very recently there was some tweet that said they were testing them in Alaska but no pics. This was after they said Elon would be getting his beta "in a few weeks" or whatever. No pics, no evidence so it was discussed on here but mostly...
Someone tweeted it or something and it was shared here. People were wondering how it could happen without our fleet of drones catching them, but clearly it did, since they were built and no one saw it. Likely built in California.
This really only reinforces the expectations I've had for some time. Complete installation of equipment in winter, test equipment and train workers in spring, start producing in low volume in summer, be pushing full capacity by the end of the year.
And I still think we'll see around 25k-35k...