David Moore pointed out in his article today that Terry's offensive production was down in part because Josh Howard's is up. But it's not just Howard, it's Stackhouse and the SF position as a whole.
Looking at Hollinger's PER rating for the Mavs by position you'll see that Mavs have actually been below average at PG and shooting guard and overall have been outperformed by their opponent.
|Position||Mavs PER||Opp. PER|