After testing the same code (above) exported with C2 and then with C3 on the same mobile device, I've got the following results:
C2: 20 seconds black screen before the default loading screen appears
C3: less than 1 second...
Well, first of all congrats to the Scirra team for solving the problem in C3!
In the meantime, I'm kind of stuck with C2 on this project and that's a real problem. Is there any way to replace the black screen at least with a cool still image form the game?
Is it possible to do this outside of Construct 2, by manipulating the exported code?