There's a level of fanboyism on these boards that is off the charts. Some people need to realise that they could be extremely disappointed with this movie.
But it's not about "from whom is the review", but "how approaches the reviwer the movie".
And with some critics you can see: they go "If it's different than Casino Royale, then it's bad" or "If it's different from the old Bonds then it's no good". Very few critics actually judge the movie as a movie. Most of them just compare it to other Bond films. And that doesn't do the movie justice.
Maybe it's a bad movie. But then they should explain why. They say: "where is the humour?" and "no gadgets in sight" and "where is the fun" etc? These kind of reviews don't bother me, because these people went to see the movie with a prejuduce.
They just didn't get the movie they expected. They felt let down.
And the positive reviews don't say that it's the best film of all time. But they give good points why this movie is good.
In the end it's all subjectiv. Everyone has to judge for himself. But everyone sees it with different eyes. So of course for some it will be the best movie of all time, and for others the worst of all time. But none of them will be right.