I mean, maybe I'm overly naive, but does Putin even need to fake the results? From what I remember last time, the ballot stuffing in 2011 was due to overeager regional cronies showing off and I'm willing to bet they'll be instructed to knock that off because it was really embarrassing for Russia.
United Russia always gets 100% of the vote on 100% turnout in Chechnya.
There's a difference between faking the results in Chechnya, where everyone knows the consequences of not voting for the Yedrobots multiple times and being cheerful about it, and in Moscow, where some youth with an Internet connection could make a scene.