Les Sayer hasn't cheated on his McDonald's-only diet. Not an apple, an orange, a cantaloupe or grapes in 17 days. Sayer, a teacher at NorQuest College and Metro Continuing Education, wanted to drive home the point to students that Morgan Spurlock's documentary, Supersize Me, was an opinion piece. He said he could eat McDonald's food for a month and lose weight, not gain it. "The main reason for doing this is because my students thought (Supersize Me) was an objective piece," the 39-year-old Sayer said yesterday. Sixteen days into the diet, Sayer says he's lost 13 pounds - he's down...