Why do some Amazon Prime items take longer to ship?

Related questions

1. Does FedEx pick up packages from your house?
2. How long will FedEx hold a package?
3. Can you overcharge shipping on eBay?
4. What happens if I drop a FedEx package at the post office?
5. Does FedEx charge by weight?
6. Can I use any box to ship FedEx?
7. How long does Amazon free shipping take?
8. Does FedEx sell shipping boxes?
9. Where can I FedEx overnight?
10. Can you use your own box for FedEx Ground?

Tags

1. #items
2. #longer
3. #prime
4. #packages
5. #processing
6. #taking
7. #processed
8. #times
9. #shipped
10. #speed
11. #guarantee
12. #refers
13. #carriers
14. #amount
15. #shipping
16. #arrive
17. #amazon
18. #reads
19. #others
20. #slowing
21. #takes