His lack of lateral quickness will make it hard for him to become a decent defender on the NBA level. Tibbs and KG dont matter when you dont have the tools to get the job done.
If you put a guy with the right abilities he could thrive playing with KG and playing under Thibodeau. Forbes might not be able to cut it because of his physical limitations.
Overall, I just dont think he fits with this team.
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If Jared Dudley can make it in the NBA this guy will not have any problems. Paul Pierce is not that athletic and he was a lockdown defender on Kobe in the finals. Danny ainge has also commented,
"He's had a terrific college career," said Celtics general manager Danny Ainge. "He's a well-rounded and versatile player. He played very well in Portsmouth in the camp. He showed that he has an all-around game."
umassathletics.cstv.com/sports/m-baskbl/spec-rel/052508aaa.htm
Check out this predraft workout with Portland
http://www.youtube.com/watch?v=stjoydSjOT4