JT's season was the tale of two (or three) seasons - look at his game logs on espn.com -
http://sports.espn.go.com/nba/players/gamelog?playerId=3462
In the months of November and December JT averaged about 16 points, 9.5 boards 1 bpg while shooting 50% from the field and about 75% from the line.
the months of January and February were atrocious (maybe not so coincidentally this coincided with the Kings worse stretch of ball in the season???) - his foul and turnover rates skyrocketed, he only shot around 36% (which just can't happen for a front court player) and he averaged about 9.5 ppg and 7 rpg.
Then the last 10 games of the season, he averaged 14/10, again shooting around 50%.
If he can even things out and average 16/9.5 shooting 50%, we actually have a better than average player in him. I don't think he has the physical skills to be an all-star, but 16/10 means he's as good as Brian Grant in his prime or LaMarcus Alridge is now, which is a pretty darn good player.