Hard to argue that those five aren't very deserving of the honour, and perhaps overdue to be recognized in some cases.
"It breaks your heart. It is designed to break your heart. The game begins in the spring, when everything else begins again, and it blossoms in the summer, filling the afternoons and evenings, and then as soon as the chill rains come, it stops and leaves you to face the fall alone." --- Bart Giamatti, on baseball
Keep in mind that last year's Grey Cup in Edmonton was played in MISERABLE cold weather...and Montreal pulled that out. I honestly don't think one team would benefit over the other if it's a sloppy track...both are outdoor teams.