Do you think Terrence Mann listened to the audio books?

[Darkling]

I was listening to the Dresden Files audio books today, something I haven't done in a while.  And a question I thought to ask a long time ago came back to me.  Do you think Terrence Mann listened to the Dresden Files audio books when he was told about the show?  I know he wasn't a fan of the books first.  I know he barely knew they existed except perhaps in passing in a book store.  But when the show started falling together do you think he listened to the audio books?  I ask this because I noticed the accent James Marsters does for Bob in the audio books (particularly in Grave Peril) sounds a great deal like the one Terrence Mann does for his version of Bob.  Vocally it's similar too as if one is imitating the other.