It's still more of a challenge though. I see people throw that line around way too often. People say that because on a lot of AAA teams you find journeymen minor leaguers, and MLB extras who are on the minor league AAA afiliate because there just isn't enough room on the MLB roster for them. The fact is AAA is a step above AA no matter how you swing it. Is it a significant step above? In some cases, no, not at all, but it's still better players/competition. The top prospects generally jump from AA to the majors and skip over AAA completely. It seems like the once a guys masters AA baseball, teams deem them ready to play in the majors if they have a long term opening. They don't want to move this top prospect to AAA because they have their former major leaguer there in his position. They don't want to release the former major league player from their system in case they need him. Teams also want guys playing everyday, so that they are ready to come up when needed. To me, Thornburg is an example of a guy who needs at least a half of season in AAA. The Brewers brought him up from AA and he struggled with the long ball. In AAA, he can go back and try and correct that problem against talent that is as close to MLB level as possible. I didn't have an issue with Thornburg being brought up when he was, but after seeing what he's done so far, I think at least a half year of AAA is needed for fine tuning.