Teh Gayz R Recuiting!
Well, one reason is that this year marked the first time they marched openly and in uniform. The military was fine with this, as they have already ended any legal discrimination against gays in the forces; they have finally caught up with the rest of Canadian society. So that's something to be proud of.
On the other hand, they also had an "information booth", so it's not like the military weren't getting a little something out of the appearance.