Kia MPG reimbursement program in USA

[Toaster Pilot]

Seems Kia have realised/been told their MPG figures in the US were "optimistic" - https://kiampginfo.com/

I can see the same thing happening in the EU eventually, who actually gets the consumption claimed by the manufacturer in any modern car?!

[Toaster Pilot]

So are the EU tests more tightly regulated than the US ones ?