Aside from all the new features that may be in iOS 8 for the users, there was one other big change that happened this time: Apple chose to deliver a significant portion of the traffic themselves. Most users do not care who or what delivers their updates or data, they just care that the system works. However for large ISP networks that have to process this increase in traffic, they do care. They need to be able to plan for significant changes in traffic volumes and a jump of 10x for anything is a lot to handle.
Previously, Apple relied on Akamai and other CDNs to deliver most of their network traffic. However, this time they handled much of the load themselves marking a new era for the company.
Check out the chart below which shows how network traffic skyrocketed once the iOS 8 software update became available.
Read More [via Nurse]