From FT story on Russian politics.
If Medvedev gets to stay, this would indicate a sea change. But if Putin reinserts himself - mostly out of ego, then it may not mean all that much.
Putin needs to brush up on his Lee Kuan Yew.
Still, you see a chart like this and you realize that Kremlinology is alive and well. I did this sort of data gathering in the 1980s.