Unprecedented?

I just saw some promotional material sent out by the 2010 Olympic committee hyping the "unprecedented opportunity" for Canadian businesses to get the attention of the world. Funny, I would think the 1988 winter Olympics in Calgary, the 1986 World Exposition here in Vancouver, the 1976 summer Olympics in Montréal, and the 1967 World Exposition in Montréal would count as precedents.