It's actually a series of commercials featuring this girl, as T-mobile attempts to create an identity for itself through creating an identity for this spokesgirl. The tagline for the newest commercial with her supposedly riding the motorcycle is, "setting the record straight," which makes me think people questioned her authenticity.
I was just being a smartass about lower-powered bikes. I live in a college town so there are plenty of mopeds and scooters on the roads, and some dual-sports too.