I was using my own splash screen loader - but I've disabled it and am looking at the new splash screen one and I think it works better, it appears about 1/2 second faster - also for some reason - I have no idea why - the loading just seems faster overall.
One thing that bothered me was that I have a graphic that has a black background - but the loader puts it on a white background.
To change this just edit the apps activity.java file in the src folder and change this line:
//set background color
splashLayout.setBackgroundColor(Color.rgb(0, 0, 0));
(as you can see I've changed that from <b>255,255,255</b> - white - to <b>0,0,0</b> - black)
A few lines up from that you can see:
boolean showSplash = true;
This can be set to false to disable the splash screen.
Hopefully these two options will find their way into the export options.