Can this much progress be possible?

Just started herbalife yesterday morning with a nutrition coach. I weighed yesterday morning and then started the products. This morning I weighed at the same time, and had dropped 9 pounds? Dont get me wrong,I'm not griping! But it seems crazy!! I do feel lighter and more energized, and yes I did use the same scale, at the same time of morning. Got any comments? reasoning? could this be all water weight