Comment Re:No need for a conspiracy (Score 3, Informative) 281
Well, the available CPU power increased dramatically since the original iPhone was released back in 2007.
Back then, the iPhone and iPhone 3G used ARM11 (ARMv6) processors at 400MHz. The iPhone 3Gs used a Cortex-A8 based CPU running at 600MHz - clock for clock, the A8 was practically twice as fast as an ARM11, and the 50% speed boost doesn't hurt, either (so nearly 3 times faster). Of course, with that added speed, the iPhone 3Gs doubled RAM to 256MB.
The iPhone 4 doubled RAM again to 512MB, and upped the speed to an 800MHz Cortex A8, roughly a 33% increase in speed, but more importantly they also upgraded the GPU to run faster. The iPhone 4s went from a Cortex-A8 based CPU to a Cortex-A9 multiprocessing CPU and upgraded graphics again.
The iPhone 5 upped it to 1.3GHz custom Apple A6 core (faster than equivalent Cortex-A9), just over 50% faster clock for clock, and doubled RAM again to 1GB.
The iPhone 5s went to ARMv8, where running 64-bit code is so much more efficient that 64-bit code can outrun 32-bit code by up to two times. Running 32-bit code, ARMv8 is only marginally faster than ARMv7, but 64-bit code is where ARMv8's speed really shines.
The spread of CPU speeds is probably anywhere from 3-5x for a supported iOS.
Me, I'm running an iPhone 4s with iOS 7. It's snappy enough - the most sluggish times are when I make a phone call and it seems to linger at the contact screen for a second or two, and when I hang up and it lingers at the call screen for a second or two.
It won't be supported on iOS 8, I don't believe. Given it's been 3 years, well, it's probably time to upgrade.