I actually own an ipad 4. Didn't notice any more discomfort than usual on it after the iOS 7 update. Yes, there was a bug fix or two, but I had no problem.
Neither do I have a large picasa stash so my phone is fine while my wife's exact same phone is gasping for air. But probably my phone has these stray files cluttering the space as well, but since there aren't as many, I don't notice.
Keep running into walls on the iPad, though, cause of the apple prison. It's a magnificent piece of hardware, but apple treats their customers as infants and most of them seem to love it. I guess if you have no qualm with only doing what the prison guards let you...
I have it for the music apps. Music reading apps, remote control of the digital mixer for my monitor mix. Those things aren't available on android or all the apples in my house would be edible.
I especially hate the absence of Swiftkey on iOS. Or anything similar. Apple keyboard is so stupid. Such a waste of fantastic hardware ...no apple fan here.
But consider this: here we have a google os, being completelly filled up with files by a google service called picasa, and the only way to get rid of it is breaking the warranty on a three month old phone. Or shipping it back to the store where my wife will be going without for weeks. She is an MD, needs it for patient calls away from her own office. Being without a phone for weeks is not an option. It's ridiculous.