That's what she was supposed to do. None of the guys were meant to get any help from their co-drivers.^As I said - "presented on television". If she's smarter than that in real life then fine but all she could do was pick on James' hair and generally get in the way.
I love Top Gear but there's no denying it's scripted to a very high degree. That the dumb blonde bit was fake or an exaggeration wouldn't surprise me one bit. Hell, I half suspect Clarkson purposely blew the race.