This seems, ah, old advice to me.
Emily Post says a fork and spoon are proper...
I don't think I've seen people eat spaghetti with a spoon to help them twirl the pasta in years and can't visualize that I saw anyone in Italy do that. Maybe my memory fails, or maybe its a regional thing. Also, most italian spaghetti dishes aren't loaded with sauce - they are more "touched" with sauce.
On the other hand, my italian teacher, originally from Padua, ate her pizza with a knife and fork.