But if no one cares, why would someone post that many pictures of the day?
I think if they were mixed crowd pictures of the posters friends having fun at the reception it's one thing, but if it was a start to finish "coverage" of the event, it is rather "odd".
What I should have said is that nobody else care about your wedding in the way that you do.
For the guests, it's a day at which they had a nice time, and some people post lots of pictures. For very extensive wedding albums that I've seen, I'd say that very very few pictures are of the ceremony, or of particularly 'weddingy' things. Most are of the party, and of friends and family having fun and hanging out.
This right here is the crux of the issue for me. A few (a PP said half a dozen to a dozen, which I think is a good guideline) photos of the wedding says, "Here's me having fun at my friends wedding." But one hundred photos says something different. I'm not sure what, exactly, but something veering towards, "This is me unveiling the event," territory.
Of course users can do whatever they want with their FB, and with their photos, etc etc, but like others have said, it's a courtesy issue. Personally, I wouldn't post photos of someone's wedding before they posted their own, even if they were my bestie and I knew without a shadow of doubt that they wouldn't mind. Same goes for graduations, christenings, milestone birthdays, any milestone event really. That's my own personal stand and not one I expect everyone else to have, but like I said upthread, the situation presented in the OP would annoy me a little. I don't think I'd say anything to the photo poster, but I would keep it in mind for the future and be sure to express my wishes explicitly the next time I'm in a similar situation.