It may be interesting to note that the ProContact RX tires that come on the 19" wheels have a UTQG rating of 400 and no low rolling resistance qualification per TireRack. The Pilot Sport 4S tires that come on the 20" wheels have a UTQG rating of 500 and are categorized as "eco" by TireRack. I'd be really interested to see how these tire/wheel combo's direct compare for highway efficiency.
Something is rotten in the state of Denmark. I am very suspicious of any max performance summer tire with a 500 UTQG. (especially when the same 20" PS4 tire not for Tesla has a UTQG of 300).