... You are talking about the same Japan that Chinese subs penetrate with impunity?
You are talking about the same USN that always seems to have a "shadow" whenever a ship goes into the Asian littorals? ...
The fact that you repeat media reports does not support the argument of a superior chinese sub force, as you try to imply.
Since those incidents are reported, the sub presence was at least known. Now how can you tell that these subs were perhaps not actually deliberatly let in close to a well known position of the group to capture their noise signature? And a "we were suprised" statement was just made to attract further subs for signature capturing?
And because there are no reports of USN subs close to chinese coasts, maybe they just go in and out regularely unnoticed.
That's nothing more than just pure speculation. But neither are your two sentences above on how good PLAN subs could defeat aggressors / intruders.
Nothing frustrates an adversary's plans more than diesel subs.
Except for, perhaps, your own diesel subs that just disappear in the ocean and don't answer any more?
When it has advanced support assets like AWACS and ground radars?
At least the support assets part is true for both sides. However, I am currently still under the impression that the EW issue is rather one sided with Growlers and perhaps B-52Hs (should they get so equipt) for stand off jamming of the area. And that capability affects the effectiveness of the assets you mentioned before.
Situational awareness, or the denial thereof to the other side, does have serious implications.
I know China has a bunch of ramjets in their inventory. All I am saying is that the defender (Aegis destroyer) has a hard time reacting and destroying a ramjet missile. That is how I come up with that ratio with 25% (successfully destroying the ramjet missile) while 75% (miss it). It is not exact but pretty reasonable percentage in an actual battle scene.
Actually, I think your numbers are far off.
We've had that ramjet/scramjet vs. ships discussion all over just a few month ago,
here. ramjets are no natural born ships killers. Especially AEGIS, wich you mention, has proven it's capability to intercept those targets. Plus ramjets have other serious limitations, e.g. in range, wich decreases your ability to succesfully launch them in the first place.