There are always the eager beavers who get stuff done and ready to go before the list is complete. There are just as many (or more!) who are stragglers whose cards don't get sent out until the next round is underway. Most folks are somewhere in between the two extremes. The good thing about this is that it means weeks of lovely anticipation every time you check the mail.
My life's been busier than usual this last little while. I've not even thought about which neg yet. Haven't checked to see how much postcard paper I have left, either. There's a good chance I'll be middle-to-the-end of the pack, but I'll get them done eventually.