I talk to people all day and when I call anyone I always say, Hi how are you? I thought it was polite to ask, so I can see why some (most) of the callers ask him that.
If I ever call in, I'll say, Hi Dave, I was concerned about you, so.....how you doing? (In my New York Italian accent lol)
Then I'll ask my question, but I'll have to think of a good one before the ban kicks in !!!