https://www.reuters.com/article/us-amazon-com-holidayshipping/amazon-on-time-deliveries-slip-as-record-cyber-monday-strains-system-idUSKBN1YF1UP

On-time delivery rates fell for Amazon.com Inc van drivers during the week ended Dec. 7, when the world's top online retailer was slammed with record Cyber Monday orders and regional winter storms, consulting firm ShipMatrix said on Wednesday.