> I think it's great that in five years of iPhone ownership that's not a problem I've ever had
I wonder what it is that your acquaintance and I do differently than you? I've been an iPhone user for a bit less than two years, and I am frustrated with it almost every day. Of course, the same was true of my HTC and Samsung Android phones previously, and even to some degree of the Nokia N900 (still the best phone I ever had).
It is not a common occurrence, but every now and then I do have some issue where my iPhone freezes and I have to reboot it to get it to come back. More commonly, miscellaneous things go wrong, like text in some areas becoming invisible, or opening an application showing me a blank screen for twenty seconds before the application either comes up or silently quits for no apparent reason. Most frustratingly, the sequence of touches I need to go through to do something requires me to react to each individual screen that results, rather than being something that I can do all at once, or even just being fast enough that I'm not paused, waiting, while some application screen takes its time loading.
If the delays were consistent, I wouldn't be very upset about it, because I would expect a certain time in between each action. If the phone could keep up the UI interactions, then that would be even better.
And typing lag... don't get me started. :(
I feel like expectations for hardware that is unrelated to the function of my phone has gone way, way up (thinness, smooth edges, tiny bezels) and the attention to the actual functioning of the phone in a consistent and timely manner is now much worse than it used to be, all around.