ky13

It just came to my attention that you can simply disable the splash screen. And it makes the problem go away. Change "enabled=true" to "enabled=false" in config/splash.properties.

I'm seeing the same thing. I took video of my RR3 bootup as well, but even more telling I think is that I installed vanilla Minecraft, straight from minecraft.net, and then installed Forge manually, and while it boots up a lot faster than RR3, you can definitely see that it takes longer than it should for no mods. Specs: Intel i7-3770K NVIDIA GeForce GTX 690 Windows 8.1 Java 1.7.0_79 Forge 10.13.3.1403