>>dereli+jN
Immaterial how independent they are because it's
completely impossible to get honest opinions of repressive regimes. The people within the regime have no real way to know whether a poll response will make it back to the government or not, so they must assume that it will. When the repercussions for having the wrong opinion are that you disappear or find yourself "volunteered" for the front line, it's best to either lie or say you think the leader is a top bloke.
You can watch Youtube videos of citizens refusing to answer contentious questions quite easily. I believe William Spaniel has produced videos (relating to the Russian General Election) where he points this out, too.