From what I seen, defense from the playoffs there is getting better, even by a margin. But it was a great experience for Yabu to have. The atmosphere is really competitive and the game was becoming more physical. CBA may not be a euro league but its more competitive than some conference in the college basketball with grown men to compete with.
The CBA is really weak; the best teams out there might not even be able to beat the best college teams around in the US(actually they might get roasted by traditional strong college teams like Duke, Kentucky,etc.).
I said some college conference, not college as whole. I doubt teams like Washington, Stanford and Oregon are much better than some top teams in the CBA. Don't forget that CBA also have former NBA players who have much more developed bodies and brings veteran experience from the NBA.
Oregon is the #6 ranked team in the country, FYI.
Anyway, it's tough to compare. A lot of the talent in the CBA couldn't compare with most Division I basketball, but at the same time, basketball is a sport that can be controlled by your top 2-3 players in a team. Most of the top players in the CBA could torch college players, and so it'd be pretty close overall from a team perspective.
What it would be helpful for someone to do is present Yab's stats in context with the other PF and C of the league, so we could see how he stacks up against others playing his position from a numbers standpoint. There are quite a few ex-NBA bigs in the league, so that will further help give us a frame of reference.
I'm not going to be that "someone", however.