In reply to Kimono:
On holiday there a few years back, I saw a lot of lycra, a lot of sunshine, and a lot of perfect roads. I got really quite wistful that I didn't have my bike with me.
Generalising wildly (it's OK, this is UKC), there's this difference between Italian drivers and British ones: the average skill level of Italian drivers is *far* higher. Therefore they push the envelope more, and expect you to be able to cope with it and to do it back. But that's with other drivers--I didn't see anyone being pushy around cyclists.