@r4mbleon I thought for some reason that was part of the autostart script but maybe it was something we discussed and never implemented. it was a while ago that we did it.
For now yes i think its something that can (should) be added to the manual installation page and/or the FAQ page.
also in case you want to have both the splash and the desktop environment you can use plymouth though its a tad (lot) more involved than switching out a png
