Yes, the staff checks your review. They check it if it isn't a copy from another review, if it makes sense (I once accidentally mixed two movie reviews into one text and the staff were kind enough to inform me), isn't repetitive (like "The movie is good. It wasn't bad. It was very very good..." those types that tries to max out the word count by saying the same thing over and over, and if it isn't spam.
But then again, I'm not a staff, so I'm not 100% sure, but I'd bet that's what they check.