Loader layout and c3 image atlas.

I notice that C3 put all sprite and sprite font and 9patch image to atlas.

So if we use any of the image in loader layout, the compelete sprite sheet of that image will load before loading progress begin.

For example if the final export contain 3 sprite sheet, and loader use some image(maybe just one logo), at least 30% of image resource is loaded before preloading progress start.

Is that true?