I realize there are numerous factors that contribute to the speed/responsiveness/snappiness(?)...(the current OS, amount of data on the device itself, data speeds, etc.. ) I upgraded from an iPhone 4 like many here, and the increase in processing (correct me if I am wrong) speed is one of my favorite features of the 5. I'm talking strictly about speed of the device itself. My question is.. and may be tough to answer. Will this 'responsiveness' diminish dramatically over the lifetime of the phone? Which I'll say is two years.. Based on upgrading timelines. If possible, what factors contribute to this slowdown and are there any steps one can take to minimize the effects? I know very little about this. If anyone could shed some light it will be appreciated.