I too would like to know any posible way to increase the iTunes frame rate to the standard 60FPS or higher/lower. It's dumb to assume that no-one would dislike a framerate so slow.
The iTunes sets only to 30FPS because the creators don't trust lowly users to set their own frame rate. Also, because most macs at the time when the edit was made (as well as now) cannot deal with the more standard 60FPS.
MOST people can easily tell the diference between 30 and 60 FPS if shown the two side by side. The 30FPS, despite theoretical limits to human eyesight, is noticably less smooth. Also, to those with high-motion vision (a somewhat unusual "disorder" of the eye which actually increases your ability to see fast events) 30FPS is just way too low. At 30FPS, I can preceive every frame seperately, which greatly detracts from the visualization. I recognize that I can easily tell the difference between 60 and 80 frames per second and most people cannot even tell the difference between 20 and 30FPS, but nearly anyone can apreciate that the eyestrain that comes with watching things with abismally low framerates is undesirable, even in a visuallization.