The demo would be more impressive if it used some actual animation. When it's just random pictures like that we have no way of knowing if frames have been dropped or even if the output is what was intended.
The demo is showing three full screen images being streamed from the SD card, in order, over and over. The FPS counter is telling you that 32 images were displayed, and how long that took.
There is no potential for dropped frames here. Dropped frames are something that happens when you try to display content at a fixed frame rate that's higher than what the display can handle.