This is how rating works: upon entering the venue, audience members are given cards with the numbers one (bad) to five (very good) on them. When leaving the venue, all you need to do is pull a small tear in the card at the rating you want to give. These cards are collected at the exit, counted, and the average ratings appear in the festival's website.
I heard people complain about a "bad selection this year", but frankly the numbers do not show much of a decline. Out of the 250 feature films, 130 got rated 3.5 or higher. Any film ending up with a rating of 4 (out of 5) can be safely seen as a general crowdpleaser, and there were 62 of those. For the same reason, getting an average of 4.5 or higher is pretty amazing, and 12 films managed to get this. Check out which, so click on the edge of the picture to start browsing the list!