@stormcell: I could mince and crouble your post but it seems other have done it for me. Anyways the point still remains Jean has always been a superior psi than Emma as stated by herself. The feats just validate how much advance Jean is to Ms. Frost.
Also The mere fact that Gamemaster can connect to 6 billion minds without even trying places him above most telepaths save Jean. Why did Selene need him to start the Upstarts?
The feats they are using to prove Jean is stronger than Emma involves Jean using the PF. They don't count. During the Morrison run, Jean had the PF, hence, when she battled Emma, she told her that it was now just her (Jean), Emma and the Phoenix. This nullifies all impressive feats Jean did during the Morrison run. So, again, where are Jean's impressive feats without the PF?
Also, Gamesmaster was never the most powerful psi. His particular mutation automatically enables him to hear the thoughts of everyone on the planet, yet it took ALL of his power to enslave a town's population of people. Shadow King, on the other hand, was able to enslave BILLIONS of people at once across the whole globe. Shadow King is much more powerful than Gamesmaster and considered only Xavier as a possible threat to him. Therefore, just because one's particular mutation equates to them hearing every thought on the planet does not make them the most powerful psi. Emma Frost, Mastermind and Selene were all said to have the power to enslave that whole town which took ALL of Gamesmaster's power to do. The inference here is Emma is stronger than Gamesmaster as well.