The referral wheels were stated as 'lightweight forged performance wheels' if I'm not mistaken so I doubt they're the referral wheels. Probably just a new color option for current 19" and 20" options on the 3.
I saw a car carrier just like in the Electrek post yesterday. I was driving on Hwy 101 north near Redwood City. It had a number of Model 3s all with European license plate holders and the same dark gray wheels on the Performance models.