There's a zero percent chance the data in the screen in this interior photo is unintentional.
It looks like 286 km of range at 75% battery life. That would put total range at around 380 km or 236 miles.
I am gonna argue that Porsche is playing a chess game.. they have been very calculating in what they want you to see and this may be a smoke & mirror type of game until Sept 4th and then surprise on the upside. As far as we Porsche owners know about Porsche, it never has underdelivered & I doubt they will start with the Taycan range wise
The best usable range on the Taycan at lower speeds is around 230 miles from 0% to full.
The more realistic range will be around 210-220miles.
If you go faster than the speed limit in the US (avg 100mph) it is around 130-140miles.