Well, one thing we have formally established is that he'll score 30 goals every season. A feat Brown has only managed once (five years ago) in his NHL career.
The 60 points Kessel scored in 70 games as a 21 year old also matches Brown's career high. The 64 points Kessel scored as 23 year old is better than Brown's ever managed. The 55 points in 70 games Kessel scored as a 22 year old (in his first year in Toronto, coming off off-season shoulder surgery) is better than Brown managed just last year in 82 games.
As for Brown's PPG performance in the playoffs, Kessel has been there, done that. From the age of 20 to 21, Kessel played 15 games with the Bruins over the course of two playoff runs, and put up 9 goals and 15 points.
So yeah, "absurd", "weapons-grade stupidity", "demented", "ridiculous"...all would be good descriptions of your position.