This is the difference between a personal interest and a professional interest.
This may sound like a very poor taste analogy but it is the only one I can think of with actual personal experience. Intelligent literate people who develop cancer will in a matter of months almost without fail know way more about emerging drugs and treatments long before their GP. The problem here is to then assume that because they do not know about something they must be useless. This is often not the case. With regards a car sales man I bet he could run rings round you with information on the Grande Punto or the Kia Rio.
A car salesman must try to be knowledgable on all cars and not to specialise on one particuler model of one particuler car. I think alot of people really don't realise how difficult a job it is. especially when you are working 50-60 hours a week then people expect you to put your home life on hold so you can research the latest models that are not even out yet.
Sadly I said this a few pages ago and no one listened.
How many people on this thread read papers or research on the internet about their job? I can sure as hell tell you I'm not going to be spending any of my own time at home researching about my job!
Like Rob said, if Fiat haven't told them they won't know.