Well, there's always the "wild card" factor.
I've fished Burnetts for 3 or 4 years now, and my compadres and I have collectively caught a sum total of one "big" (by my low standards) bass (landed and released by my youngest son last winter).
I was talking to some old timers about it, and they claimed to know the guys who dropped the bass into Burnett's after catching it at some other pond.
(I know that's a no-no, but who am I to complain?)
So, while (as far as I know) there are no "resident populations" of bass in Burnett's, you never know what someone might have "stocked" there on the QT.
(In the same vein, this past fall the nephew of another acquaintance caught a 30+" pike in the Gazebo Pond at Greylock Glen in Adams, and I can assure you there are no wild pike in that Pond).