It's not working at all in my case. Even the splash screen is still visible.
What is the location of your advancedsetting.xml?
I ssh in and edit it with nano, so the location is /storage/.kodi/userdata/ - if using smb then follow the previous advice. Make sure to use a text editor that uses linux style line endings.
I think when I disabled splash screen it still displayed until I cleared the cache, after that it no longer displayed.