I'm trying to guess what the result of the polls on Sunday will be. Somehow I doubt it'll be the modest "Syrian" 97% we saw in Crimea. Judging by the choice of the term "People's Republic" for Donetsk, I think some of these Eastern Ukrainian votes will come closer to a "North Korean" 100%. The separatist paramilitaries will want to prove they are even more Russian than the Crimeans.
Looking at this photo of the current leadership of the "Luhansk People's Republic" we can expect the actual business of vote-counting will be a long process involving the removal of shoes and socks.
Will Putin acknowledge the result? He won't necessarily have to. As I've noted before, Armenia has never officially recognised the independence of Nagorno-Karabakh even though the Armenian president Robert Kocharyan had been president of the breakaway region. Putin's game is plausible deniability - with very little emphasis on the "plausible".