Now, now, folks...
Everyone's entitled to their comments and views, and no one should be slating another poster in this thread, just because their view is different to your own.
Whilst Todd Tomorrow is - for the most part - correct, in that most critics are NOT in bed with the film-makers, there are some critics and some critical publications, who do
appear to be less or more biased towards some films and film-makers, than others.
EMPIRE is very pro-mainstream cinema, and it uses that to its advantage, by getting lots of photographic scoops from the major film distributors and film-makers who want to show-off their latest work. That's all fine and dandy, if all you care about is what a director's next film is, how much the budget is likely to be, and you want to see page after page of location pictures.
However, something like SIGHT AND SOUND magazine, is very anti-mainstream cinema, and unless a film is truly exceptional, it will - for the most part - give it a real critical roasting. Clearly, there are exceptions to both of these examples, but for the most part, what I've said is true.
With that said, both of these magazines cater for very different kinds of readers. Just as when the Daily Mail gives a film 5 stars, versus The Times giving a film 5 stars, doesn't mean that either publication's review is any more worthy than the other. (Though any film that the Daily Mail gives top marks too, is likely to be absolute garbage!) They're just appealing to different demographics. You don't buy THE SUN for intellectual stimulation on poverty in the Third World. You buy it, because you like short sentences, enjoy seeing naked women, and want to know who Jordan's latest marital conquest is! Likewise, you wouldn't buy THE INDEPENDENT, if you want to know the latest in celebrity faux-pas scoops!
I should also state that there is a BIG difference between film reviews and film criticism. A review of a film, is just that: one person's view on whether a film is good or bad. He/she says "This film was fun, 5 stars." "This film is dull, 2 stars". That's what EMPIRE and most film magazines and newspapers do. They review films, and do so based almost solely on the "talent" in front and behind the camera.
Film criticism, which is where the person discussing the film actively goes into far more detail about the film, its relationship to other film's of a similar nature, examines its relationship against social, political and moral issues, and then (possibly) decides if the film is worth your time, money and attention. A film that has been critiqued, may not even give you a "See it" or "Don't see it" conclusion. It may just describe good bits and bad bits, but offer the reader no actual definitive answer as to whether to go see it or not. The reason being, that the critic and the reader is assumed to know whether or not a film is likely to be to their own tastes, and the job of a critic is to weigh-up a film's pro's and con's overall, not to say "See this film" or "Don't see this film"!
EMPIRE is aimed at 15-35 year olds, average, multiplex fimgoers, who are looking predominantly to be entertained by a film. These readers, generally, just want to know is the film any good; do the cast compare favourably or negatively against other previous works they've been involved in, and is it worth you spending £10 on a ticket for, when you go to the multiplex next Friday or Saturday night.
SIGHT AND SOUND is aimed at 25-55 year olds; who have studied film at College or Uni; who tend to see films not just for entertainment; who want intellectual stimulation, and look at films as a form of art, rather than just 90 minutes of post-pub entertainment. These readers tend to be those who frequent arthouse cinemas; are more ecelectic and discerning in their cultural tastes; who may even write (or have written) about films themselves on blogs, websites, during study, etc; and who take film far more seriously, almost to the point of being quite nerdish and obsessive towards it (and I'm not talking in the sense of being able to tell others what Robert Pattinson's shoe size is, or why Harry Potter classifies as the best in modern cinematic entertainment).
I'm talking about those who know who Sergei Eisenstein was; can discuss postmodernism in film; have at some point reads works by Pauline Kael or David Thompson; can explain intertextuality or hybridity to you, and if asked, would be able to tell you (at length) why Vittorio Storraro is a master cinematographer. (If none of that means much to you, then you are probably not a SIGHT AND SOUND reader.

)
I appreciate that I've probably made huge generalisations, but therein lies the (marginal) difference, between film reviewers and film critics! They are not the same!
Pooch