Wow..what a timely article! I JUST got the battery replaced in my iPhone 6s last night. And what this gentleman showed is exactly what I've been experiencing. AND I had also downloaded the Geek Bench app and had almost the exact same numbers. After getting my battery replaced I came back with a 4444 score on the dual core test. And to me, it really is running faster! Also, I had downloaded the Battery Life app (free) and it now shows "PERFECT!" for percentage of battery wear life. Totally worth the $30!