Hmm this thread seems to be going into wrong direction now...but its my fault, i was too vague.
What i meant to say is this:
If we assume that there's a war where US does air strikes and cruise missile strikes on china - but no ground invasion - it'd be all very similar to what went on in 1990 versus iraq.
Except that china is a much larger country with many more targets. I'm gonna go with a multiplier of ten, and even that i believe is an understatement.
So lets assume the capability gap i mentioned in the first post is same in our hypothetical war as it was between us and iraq in 1990.
During little more than a month of air operations in first gulf war US led coalition lost 40 airplanes to enemy fire and had 40 more were damaged. (that's not counting accidents and friendly fire incidents, of course) Out of 40 that were lost, 30 were US airplanes and 10 were from other coalition members. Only one plane was brought down in air to air combat, and it was american f18. All else were destroyed by AAA fire and sams.
Using our multiplier of ten, minimum number of planes US can expect to lose in such an air war is 350. (since those 10 coalition lost planes in 1990 were, in part, not as advanced as us ones, i'm giving the benefit of doubt that less would be lost had all the planes been US ones)
So that's absolutely most optimistic figure for US if it does get entangled in such a war.
But some have said, and i do agree, that the capability gap between today's china and todays us is less than one between 1990 US and iraq. Why? Cause iraq had a much weaker, much more centralized (prone to decapitation) and less advanced early warning network. Cause its military equipment, planes, aams, sams was, even for back then just not as modern as chinese stuff is now. Yes, there's tons of old equipment china has now, too, but on top of that there's some top of the line stuff. Pilot training is better in china than it was in iraq then. Stealth was completely new back then, one needs to remember that f117 was unveiled to public only 2 years before the gulf war. Todays stealth tech in b2, even though its superior to one used on f117 is well known how it works and what one must do to higher its chances of success against it. Finally - unlike iraq - china has strategic depth, far away airfields, bases, factories, etc, out of reach for a good deal of US planes, putting those that can attack 'em into a more dangerous enviroment.
Of course, one can still only pull assumption out of one's behind, make up figures. So i'll do that and say US can not realistically expect to lose less than some 600 planes before obliterating most of PLAAF and PLAN's equipment and severly damagning china's command and communication netowork, taking out military factories, etc. Its not improbable the final number of planes lost and so damaged they'd have to be written off would approach a thousand.
So, while it would undoubtedly cost china more, the losses for US would be vast as well, so big in fact that it'd have to ask itself just how much of an edge it has left over the rest of the world, and if it is ready to put itself in such a position, especially with countries like N. korea and syria and Iran who are supposed to be in check because of fear of US attack.