That's the tricks Tesla always did. Is production started under a 1/8 of planned shell size the same with 1/4 or 1/3 planned shell size? How much money Tesla spent on GF construction out of 2.2B raised money? Probably no more than 25% at this point. Panasonic is still mainly on the sideline and no progress on other battery manufacture partners. Tesla has history to claim everything on track until it can't hide the truth anymore. The story already happened on model X and 2014/2015 delivery.
Ah, what evidence is there that the Gigafactory is lagging behind schedule?
Here is an example of what was said in 2014:
Tesla Giga Factory: $4B to $5B Price Tag, With Battery Production Slated for 2017
From that article in 2014, it says, "The plan is for construction to start in 2014, with production beginning in 2017." Tesla is now saying that production will begin in late 2016. How is that late?