I have heard enough of him on PTI and interviews to base it off of.
Now, it's been a while and maybe he has gotten better or he was just playing one of his schticks at this times.
Either way, for what I have heard, all he knows is Boston and not much else.
Well PTI isn't exactly the format for guys to show off their vast knowledge. And he's way more knowledeable than Kornheiser and Wilbon, but it may not shine through in that format.
And like Seth said, the last line couldn't be further from the truth.