I was wondering, as you said that they couldn't be detected by radar.
The Russian Torpedoes are the VA-111 Shkval capable of radar evasion and travel at 220+ mph.
Unless they were sea-skimmimg missles, similiar to the Harpoon, how would radar detect them? Sonar perhaps, but anything going that fast in the water would be quite easy for sonar to track. I had read of the supposed super torpedoes, but they were short-range, and rocket-propelled, and had problems with guidance, and porposing in all but the calmest waters.
As for ICBMs, the MIRV'd warheads of the US, since the 1970s, have had jammer pods in the section of warheads delivered. Nothing new. Electronic jamming is a dynamic science, and improvements are usually evolutionary, rather than revolutionary.
Nowhere in this discussion have I read anything, by anyone, that advocates underestimating an enemy. What I object to is the assumption that the United States military is either unaware of developments, or chooses to ignore them. Nor are any innovations of the military ever discussed.
As for the Chinese sub, and it's "overwhelming" superiority against a Battle Group, where does this come from? We know, and have known for decades, that the military does not always allow all their features to be revealed. It's quite possible that the Chinese sub had been detected, shadowed, and the "routine patrol" that found it was just "around them" by happenstance. Why would we allow the Chinese to realize just what we could, and could not, be capable off?
Does anyone here truly believe that the Russians, or the Chinese, could field a 230+ mph torpedoe without one of the various intelligence agencies knowing about it? The Russian sailors would sell that info to get out of Mother Russia.