I think a lot of it has to do with the frequency that you air his breaks during an air shift. I don't know if the Tesh people set the number of "talk" breaks his affiliates must air in an hour, but for a Hot AC it really should be no more than 2 or 3 in my opinion. His show topics are informative, but if you're airing too many of them it can absolutely obliterate a music set.
Probably not a good choice for Modern AC. For Hot AC it has a lot to do with, again the number of his breaks you air each hour, and more importantly how "hot" your Hot AC is. Just my two cents worth. Others?