I think you give Porsche drivers too much credit. How many CIS threads have come up that sounded like this:
"Hey my car runs bad, my friends uncles brother in law held a wrench once, he said I needed a new Warm up regulator so I replaced it and it still runs bad new he says I need a new fuel distributor help!"
Someone replies and asks what the pressures are, to which the reply is usually:
"Pressures? What are pressures?"
Tom