Correct! And that NUMMI run rate Toyota achieved was (supposedly) only 60% of the facility's total manufacturing capacity. It appears to be entirely realistic for Tesla to meet their 500k/year vehicle production rate at NUMMI.
Right, they ramped up expectations ridiculously high with the Model 3 unveiling, but before that and when Gigafactory was just being talked about (before official construction), they were talking about 500,000 cars per year by 2020.