Benchmarks don't matter in the mobile world, unless you're comparing things from the same line AND you actually get a good use of your mobile device, like in, "advanced" use.
For instance if you take the 4s vs the 5, then you can see there is a "speed performance" boost on the 5 and if you use any app that you feel kinda "slow" on the 4s chances will be user experience will improve on the 5.
I know they post things like "Oh it now opens pages 0.5 seconds faster, and if you open X pages a day then WOAAA you're shaving off 10 minutes per day" and placebo comments like that.
When you are not comparing things from the same family... then trust me, it's just "bragging rights" like a former user said.
Of course the mobile benchmarks nowadays are the new black... or maybe the new megapixel (back in the time -maybe still relevant nowadays?- when people got cameras just because of their megapixel specs, when you can have a pro 5 MP camera that will put your cheap 12 MP one to shame).
At work, people are stupid enough (and I say enough, because we're mostly computer scientists there... imagine "regular" people) to buy whatever comes out next just because it has a "faster processor" and stuff like that. Then all they use is their twitter and facebook app.
To put things in perspective, the poster above me talks about stuff that makes him buy Android devices.
From my perspective, I use Auria, Audiobus, Sunrizer (and the list goes on), to name example and latency on Android is still a joke, so from a "mobile musician" perspective I couldn't care less about any Android device, even if it was the most powerful one in specs out there, just because it's a worthless system for music production on the go, from my perspective.
So see? It's all about what you really like and need, not about some nerd scores.
It's all placebo... expensive one