While goggling I've found this nice movie of a crossfire being tested. It's german but I'm sure you get along with this anyway.
The driver is a former touring car race pilot. He drives the xf on the legendary Nordschleife of the Nuernburgring/Germany. And as you can see/hear he demands a great deal from the xfire.
The spoken things: First the narrator declares the specifications of the car (HP, top speed, weight etc.). Thereafter the driver talks while driving. He mostly explains the course and some of his actions. Finally he rates the car: He would give a 2- , but regarding the car was concepted for the US market he gives a 2+ ... ... Germans.

http://www.kabeleins.de/info/aa/auto...ndex.php?11862

scroll down until "Das Video" then click "zum Crossfire-Profitest". In the pop-up window choose the connection speed and enjoy!

 

Thanks for the link. We need a reference for what 2- and 2+ means. Is it on a scale of 1 to 5, 1 being the best?

 

Yes 1 is the best. The + and - is like you have A+ or D- at school.