I'm not too worried about the images being blurry, I can't think of any point where I take 5+ pictures one after another. The reason she probably had blurry pictures is because she isn't holding the phone steady, she was trying to check out the quick shutter speed. Hold the phone normally without trying to take 5 pictures in 2 seconds and I imagine you'll end up with clear pictures.
The benefit of zero shutter speed is so you get a picture of what you want instantly, not to take 5 pictures in 2 seconds.