They used to be awful... Then they started changing about 20 years ago. My last encounters have been pretty good... actually even nice. Some of it I credit to having ALL the paperwork correctly before I walk up to the counter, dressing half way decent and being polite. A nice smile and "how are you today?" helps a lot.
DMV clerk's have an "off day" every now and then too I suppose... Try Orlando sometime, they all seem to be confused as to how to complete what ever transaction.
I think I will try the Highlands county milf next time...