Its a no brainer that these attacks are bugged and yet you have people saying otherwise. Although the attacks aren't bugged for me I do believe they are bugged for a lot of people. Otherwise we wouldn't have a lot of threads about it.
I have the same thinking when it comes to the overwhelming vampires which to me I think are a combination of bugs and poor thought.
Bugs, too frequent or too many vampires (like the random spawning monster bugs that spawns like 20 NPC's randomly all together)
Poor thinking as in, vampries scale to your level but do not attack you first. Rather they attack civilians. Which are 1 hit killed at high levels because they don't scale in level with you too.
I don't have the large number bug, but seeing how I've hit a good amount of bugs that others haven't, how some have had perfect games and others haven't, I find it perfectly reasonable to believe that there are overwhelming bugs dealing with vampires that I just have been lucky enough to miss.