Thank you very much for posting this thread.
The EPA test is a very specific procedure. If the car makers would wise-up, they would program the computer to recognize that it was on such a test routine, and behave as buyers want otherwise.
Our C230K and Explorer have no such stupidity! I'm sure I'd notice it if the ones I drive have it, especially sicne I won't buy a vehicle I'm not familiar with unless I've had a good long (75 to 125 mile) test drive in assorted traffic.
I've got expereince with turbo and super-charged cars, going back to my 1984 Sunbird with the 1.8 turbo and manual transmission.