Tanzanian shipping

My friend Liz just sent me a message saying that a friend of hers had mailed a box from Zambia that finally arrived in the US today, only six months later. I laughed at her. Then shortly after, I got an email from a customer who had ordered a product from us last autumn. She said that it arrived today. I remember putting the box in the mail on October 4. So that's 240 days to ship a box from Tanzania to the US. That means that during that whole time, the package was moving at an average of 1.37 miles per hour. Yikes.