There used to be an enroute guy in Melbourne that could talk faster than anyone you have ever heard before! 9 times out of 10 the pilots were asking him to repeat himself. He seems to have disappeared in the last year.
Now there's a guy on there who gives so much information that he runs out of breath by the the time he has identified your conflicting traffic, he constantly uses free speech for all chatter. That being said, it's great service, however he runs himself thin because he can't get all the info out in time with the number of aircraft out there. Oh, and he is extremely polite, not to say that the others aren't, but this guy is something else.