You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
Hah, should have found an easy Google search before. It looks like ideal range on the first US deliveries was 330 miles so that is already higher than the 508km in this picture.
In my 85 I can choose between "Energy" or "Range", and in range I can choose between "Rated" or "Typical". Last time my 85 was charged to 100% rated showed 499km and typical showed 399km. Rated is based on the european new NEDC testing standard.
See screenshot from the norwegian website.
So, in europe, yes this could get to 508km, but not Canada, as you get the more realistic EPA range. I never use the rated range myself, only typical or energy views.
Edit:
Also, here is a screenshot from the UK site showing some high numbers in miles.