Actually, I read it a bit differently. Tesla appears to be actively trying to change its image of not being able to deliver things on time. The announcement was that they've turned on the factory (last month, quietly), and have done so ahead of schedule. They also said that they delivered on their employment commitment to Nevada ahead of schedule. The investor angle is, of course, important too, to maintain their stock price and valuation. Besides the fact that they are making batteries, the engineering manager in me also sees that they are being smart about deploying those batteries in the PowerWall product line first. That's a product that is not so much in the public spotlight, and with lower unit demands, so a better place to iron out any kinks uncovered in the production ramp. They know that they need the factory to be running well in order to meet the demands for the Model 3 ramp, and this is evidence that they have a solid plan in place to do so.No, it sounds like it was just an investor reassurance that everything is going well. Nothing new here.
Maybe Elon was practicing giving Boring updates
The only thing I didn't read in the announcement is how the other suppliers are doing on their July 1 targets. But certainly, Tesla's gigafactory is not going to be the supplier that will hold things up.