I have to agree with many here that it is very much unquantifiable, every sort of information that can/could be taken about it can be/will be manipulated or not representative of large enough groups of people.
There is strength in anonymity, which is why the loudest are always on the internet, or the most violent behind masks; cloth or persona wise.
On a whole, I think people are sick of compromise. We've compromised up to this point, voting between what some might consider **** sandwiches and giant douches. And not just elected officials. We're seeing what is happening to EA, people don't want to put up with that **** cause it's the only star wars game out. They aren't having it. Healthcare or whatever all kinds of decisions where people have to choose between two bad options. And no one below the "1%" is getting a whole bite of the sandwich.
We are the most "aware" we ever have been, and we're able to see just exactly what we're capable of and no longer have to be subservient to any flag or group if we choose not to. People are creating their own communities around their custom beliefs in real time, faster than ever.
I think those terms centrist, leftist, right etc are very antiquated already, especially since they are so subjective to locality and person.
Example, the left as far as their pro-socialist views seem concerned most about the starting point of everyone, and the degree to which people are given handicaps which make life easier or more difficult for whatever reason. Money, race, nation, etc. The right pro-capitalists seem to most argue the interpretation of the end goal/finishing line or what the reward is for being meritorious or excellence. This is obviously extremely simplified with a healthy dose of opinion, but both parts are saying the other is wrong when talking about 2 different things.
This was a ramble.