I was told invites started at 19h and ended at 19h15.
I log in today at 18h55 to notice that all tanks (tanks & healers are invited first) are already invited.
I then hear from a friend that warrior invites closed at 18h45.
Really, I don't mind not getting into the raid (I don't even need anything from most of the stuff we raid).
What I do mind is rushing home to make it to the raid-invites on time (to help other people get their stuff), just to hear that someone, in the spur of the moment, has moved those invites forward in time.
This is good example of how the guild needs some better organization.
A change like this one should be announced on the forum and in gmotd in-game at least a few days beforehand.
To my knowledge, there were no such announcements at all.
To people who do want to be in the raid badly, this may feel like the officers back stabbed them, it's simply bad for the guild's atmosphere.
It's also another reason to have a raidcalendar, which in turn is part of my whole "get organized, bring some structure to Poem" plan. :p
VOTE INSTAND!
</rant>