Frankly, unless you're in the business of listening to Russian submarines this entire thread is just talking out of your a**.
Those that are in the business never open their mouths and with good reason. Having worked, played, and drank with many 'silent service' gentleman out of Groton Connecticut I learned that the 'silent service' description is accurate both at sea and in port.
Very true. Our own "KillnU" is a long serving Chief on one of the USA's 688 boats, and you won't get much other than what boat he's on, and that it goes in the water out of him. It's a very serious business, right on the pointy end and lives are at stake every time a boat goes to sea to help protect our freedoms and lifestyle in the western world.
I've read much the opposite regarding current Russian naval subs, that they've gotten very quiet, not as good as the Virginia, Seawolf, and some of the Nato AIP propulsion electric subs, but they have vastly improved compared to the old louder classes. The same goes for the Chinese, their latest, and I mean latest subs are a full order of magnitude better than previous units with regards to sound footprint and systems. http://www.jeffhead.com/redseadragon/2013.htm has some great info on Chinese naval assets, and Jeff Head is a former US Navy expert on their capabilities. Email him some questions regarding Russian and Chinese subs, and you'll get your eyes opened as to what the actual state of things are - underestimating them would be a massive, massive error.
I always think of the AA-11 R73 missile when people start to blow off Russian/Soviet technology. This missile was in service a long, long time before the Aim9m, and Aim9x, and for years the Russians had an IR missile that was superior to the Western counterparts of the era, like the Aim9L and others. Also, not to mention the fact that it could be fired off axis from the helmet mounted sights the Soviets/Russians had which none in NATO did at the time. All the while many writers, analysts, and interested civilians thought that the current Sidewinders were the king of the roost, when it just wasn't so. Writing off the Russians and other potential adversaries as making "inferior crap" is a vastly oversimplified and incorrect way of evaluating their capabilities IMO.