I think the minor league performances of Dickerson and Taveras are different than Homer's of two years ago because of the level of competation. As of two years ago, Bailey had yet to pitch in the upper minors while Dickerson and Taveras have both played there. Performance in AAA is much more suggestive of major league ability than is performance at high-A.
But that is what makes baseball interesting. Two years ago, I bet most people on this board thought Homer would be at least an adequate #5 by 2009. Now he's in limbo. Minor league stats are a nice tool for predicting future performance, but they are not full proof. 100 ABs at the big league level likewise are encouraging, but not proof. I hope Dickerson does seize the job, but next year if he's the starting CF, the league is going to put him under the microscope and pick apart all his weaknesses. It's not a given that he will perform well.
Also, the Reds need to plan for the contingency if Dickerson gets hurt. They need a cheap back OFs that can cover all positions. I'd rather not have the plan be to shift Bruce to CF in the event of an injury. I'd like to keep him in RF all next year and let him worry about improving there.