The articles at some point says "The 2013 Nissan LEAF boasts innovative features such as 240V charging that is nearly twice as fast as the previous model, as well as a broader range of trim levels starting with the even more affordable S grade, moving up to the SV model and graduating with the top-of-the-line SL."
Can I safely assume that this is also the case for all Leafs manufactured after 2013?
The 240 volt charging mentioned is Level 2 charging, and Leafs have always had L-2 capability. They are talking about 240 volt charging with a doubled amperage rate
(6.6kw), and thus charging for the SV and SL that is about twice as fast as with the old 3.3kw onboard charger, which was still used in the Leaf S.