Personally, it seems people in general only give 1, 3 or 5 - they like the image, they give it a 5; the either don't like the image, or the don't like the artist, or are just basic pricks they give it a 1, and a few others toss out 3 - often with constructive criticism. I think the numbers should be gotten rid of entirely, and said so a while back in the Complaint and Debate forum. It seems to be a fairly common subject down there!