I guess those big savings (ie. OEM deal and contract renegotiations) are so up in the air that they choose not to comment on them. It's fine for analysts to speculate, but I think its kind of bad business for the hypothetical combined company to be publically speculating at how much they can squeeze the companies with whom they currently have contracts. I know that would piss me off.
"Who do they think they are?"
Maybe it was smart to just kind of comment on near term efficiencies that can be realized. Most of these long term projections go out, what like 5-7 years? 10 years? 400 mil a year x 10 years = 4 bil.