I am new to this forum but thought I would put my five cents worth in regarding this problem. I echo the same issues just about everyone else in the thread has, when using the window at just over half of the screen (vertically) on a 24" monitor at a resolution of 1920 x 1080 the typing becomes extremely laggy, ianfitz video he posted demonstrates the exact issue I am having, I tried to take a look at what peppy posted but the dropbox link doesn't seem to be functioning anymore. Like others have also said in the thread when using "fullscreen mode" typing just becomes unbearable.
I am using the latest version of Sublime Text 2 on Mountain Lion (10.8, Mac Pro) with all software up to date. I have installed some packages within ST2 but from what people have reported this problem is evident in clean installs as well so I really don't see the point in removing what I have. I am a very big fan of ST2, I have found it to be an excellent editor after trying multiple others I wouldn't change. I do hope something in the form of a patch can be released to resolve this issue or some feedback on how to fix it because it is really annoying not being able to split screen my development.
I will be keeping a close eye on this thread to see how it goes, thanks for your time.