Never said he was. I would be the first person to say that his bullpen stint in 2007 created ridiculous expectations for him. Joba, overall, has had very good results considering his age and amount of experience.
However, everything I said is true. He has never been able to hit spots with his fastball. When he pitched out of the bullpen, he got away with it, because he had more velocity. The same isn't true with him starting. On top of that, he seems to be getting a lot less swings and misses on his slider. I'm not advocating that they send him back to the bullpen. However, his lack of control is a concern to me.