i ran test on my Macbook, the score as followed; 3d mark 06: 1955 3d Mark 05: 4136 PC Mark 05: 3953
i would say the performance is pretty much the same (if not better) as Sony Z series with "performance" setting.
I think Sony is not going to be happy. their "performance" setting is pretty much the same as Macbook's "Standard" setting. while on the battery optimized setting, the battery life is about the same as Macbook, too. (in that case, why bother switching between those 2 setting)