I purchased the ACD 23" last week and I've been experiencing some noticable lag when using the MBP (Open) + 23" ACD at the same time. I notice the lag or sluggishness when I: Resize windows Use Expose Use Dashboard I have the previous model of the MBP 2.5Ghz with 4GB Ram so I am wondering if this is a general issue because the MBP is trying to use 2 displays. Is the only way to counteract this issue by simply using the MBP in clamshell mode or is there a fix for this? Does this lag have anything to do with the age of the ACD's technology? (Would the 16ms Response time be the issue?) The lag isn't major but it is enough to notice that it is going on. Any help or thoughts is appreciated. If you experience the same thing, please let me know.