I just tried to install Plymouth splash screen, to see how it works. But it doesn't.
I do have KMS up an running, I think. Running a Core i5 with IGPU HD4000 and the auto modeswitch setting in the kernel do change my console resolution, altough I dont know what resolution I get.
Booting with nomodeset does nothing, except destroying my ability to quit Xorg because my console isn't resetting when I quit X.
Anyway, testing with
plymouthd; plymouth --show-splash; for ((i=0; i<5; i++)); do plymouth --update=test$i; sleep 1; done; plymouth quit
will switch to VT 1 for 5 seconds then back, but it only shows the text that already is on VT 1 no graphical splash. And yes I have tested setting different themes.