ak_web your post strongly resembles the same quality exhibited by many of the top ranking sites that have surfaced in my niches after these latest updates. No wonder you don't see a problem with the Google results!
You cannot seriously not know that these spammy substandard sites are ranking across the board. If you do not know that then you obviously have no idea what you are talking about in regards to your other points.
I agree wholeheartedly with George. I think this is a stage of letting the garbage rise to the top before nuking it. There is no way these results will stay this way or people will just stop using Google.
No-one wants to read substandard English and be subjected to useless information that is, at best lacking and at worst, irrelevant to their query thus leaving them with no option but to click on an advert or the back button!
Things will settle down eventually.