A.) That opinion (that Intel is cutting prices by 50% or more on P4's) is the opinion of
ONE WS analyst; notably one who has been very negative on chip stocks for quite some time, and who has been right less often than wrong. Will definitely be interesting to see how low they go.
But there is no way any of these analysts know exactly what the new Intel prices will be for sure, and if one does, then they have violated SEC rules for sure.

Furthermore, I doubt there are even many at all in the Intel "channel" who know the specifics of the price cuts yet.
B.) In a question of who can cut the most cost, over a prolonged time period, I'd bet that the company that currently has a 49% avg. margin can survive far longer than the company who currently has a 19% margin.