There are just too many stories of cyclists being struck and left for dead. Very scary. You didn't say but were you riding alone? I believe that riding in a group offers much better protection. For one you are more visbile. Two - much less chance of harrasment. Three - I have found cars more cautious around groups of riders than just a single rider. And, finally, if you are struck then is someone right there to summon aid.
Yes - I have heard that even long pacelines of cyclists are occassionally taken out by a distracted driver.