Exactly. And some people have kept the blanket longer than planned. (A few people kept it a month.
Here's the process:
The blanket is mailed to the next knitter, with a delivery confirmation number sent to the recipient. Sometimes the package is sent quickly...other times it gets held up in the mail.
When the next knitter receives the blanket, they knit their part, then they contact me to get the next knitter's info.
I then contact the following knitter to see if they are ready for the blanket. Sometimes, they respond immediately. Other times, they respond the next day, or two days later, or not at all. I usually only wait two days for their response.
If they don't respond, I move on to the knitter after them, and wait for THEM to respond to say they are ready.
Usually the next knitter is ready, because most of us are excited about the project.
When I get a knitter that is ready to go, I contact the person with the blanket, and give them the mailing info.
Then, it's up to the person with the blanket to get it to the post office and mail it off.
It would be nice if things went quicker, but everyone is living their lives and dealing with their own issues. It's not a perfect world.