Reading through this thread, I can't help but feel that some people over-analyse the show.
I take it for what it is - an entertaining programme with an automotive theme which provides some enjoyable watching on a Sunday night. Of course, the gags are sometimes very scripted and you can often see things coming long before they actually happen, but who really cares? Just watch it and stop over thinking it.
I appreciate that people have differing opinions about the presenters on the show too, but in truth, neither of them are particularly offensive viewing.