For my iOS devices, the devices themselves are slow enough at rendering web content in MobileSafari that shaving a second or even two off the resolve is not so

For my iOS devices, the devices themselves are slow enough at rendering web content in MobileSafari that shaving a second or even two off the resolve is not so much a benefit. The real benefit for me was the CDN content coming through much much quicker for the App Store. iOS 5 has gotten so capable of managing content with iCloud and such that I rarely tether this to my laptop any more. As such, quickly downloading an app while on WiFi is very important, since anything over 20MB requires you be on WiFi to do it. I only came about this information by noticing that I was getting significantly higher download speeds from the App Store while at my parents' house on their WiFi than I was at home - yet we were both Comcast customers and I knew that I was paying for a slightly higher data package and had been able to perform 16Mbps sustained transfers on my laptop for non-App Store content routinely. So I copied down the Comcast DNS settings that my folks had and tried them out, manually, at home on my iPhone. The speed difference was almost immediately noticeable. Prior to that, I'd been using Google DNS servers 8.8.8.8 and 8.8.4.4. Just simply changing my DNS servers resulted in a much better performance. I'll have to shop around to see if I can tweak it even further :)