Here's a question. How exactly does one rise through the ranks of the GK whilst being stuck in the warp? Would not the constant battle for survival in a realm of pure madness make it a little difficult to co-ordinate anything? How do the other GKs even know he's still alive in there?
The whole story is just full of holes in you ask me.
They use email loaded on PDAs with windows 7. Bill Gates is after all an agent of Tzeench. Yes even in the warp the big 4 all have wireless connection.
Didn't you hear about the Khorne's new internet cafe chain Coff- Blood for the Blood God. Somehow anything that guy says winds up turning in to a blood for the blood god spill.