As the Cannes Film Festival approaches its weekend awards ceremony, critics are divided on the movies seen so far. Some are polarized on whether cinema is more entertainment or art, while others show cultural bias. US and British press and industry types are plumping for 'Carol', while continental Europeans are more seduced by 'My Mother'. Two other Cannes movies, 'Youth' and 'Son of Saul', are also seen as worthy leading contenders. Only one movie has been unanimously panned.