Sites Losing Traffic

I’ve recently noticed, since around the 20^th of October, certain sites are losing visitors. GA dashboard reveals that traffic is decreasing steadily for about a week. And not just a single site.

What’s wrong people? Can someone explain? Besides Panda and the usual stuff about contents, etc. has something new turned up? Like some new parameter being introduced in ranking? Or something else?

Well, some websites just plain out suck. YouTube is a big example of that. It used to be good, but now it sucks ass.