As if we didn't already know that the iPhone 6 and 6 Plus are awesome, here comes proof from iClarified (via MacRumors) that the devices offer extremely fast Wi-Fi throughput compared to the iPhone 5s. How fast? The iPhone 6 Plus was able to rip through a download at 278.5 Mbps, while the iPhone 5s was limited to 101.1 Mbps.
What's the difference? The iPhone 6 and 6 Plus come with the ability to connect to 802.11ac Wi-Fi, which can offer connection speeds of up to three times faster than the 802.11n Wi-Fi found in the iPhone 5s. To test the relative speeds, iClarified restored the devices to iOS 8.0 and connected them to a 2013 Apple AirPort Extreme. That version of Apple's Wi-Fi base station supports 802.11ac.
While your ISP connection to the Internet is usually the limiting factor in just how fast you'll be able to surf your favorite sites, anyone using one of the new iPhones on an 802.11ac network should be able to see an improvement.