Trust me, I'm not an Apple "It just works!" guy, look through my post history at my rages over my MBP and the troubles I've had with it (and Apple's crappy customer service in Australia)- it's been one of the worst products I've ever bought. My iPhone 3GS, however, was solid up until the most recent updates for it.
As I've said in other topics, if you don't want an Apple product, there is another alternative! You don't have to get an Android. Windows Phone 8 devices and Windows 8 tablets are now out and are awesome. On that note, I finally tried a Windows 8 tablet out after work last night, it was an Asus RT model- the UI feels amazing on a tablet. Can't wait for some good x86 Windows 8 tablets, I'll be on one ASAP.
Didn't you say apps were utterly important? Microsoft's app store leaves a lot to be desired. Much more than the Play Store. As the Nexus name gains momentum, the Play Store will not only continue to grow, but will get better in quality.
Your other important feature was a lag-free and highly responsive OS. iOS is not lag-free nor is it 100% responsive. I've had plenty of experiences where I tap on an app icon, and the icon gets greyed out a bit so I know it caught my tap, but it won't launch. I experienced this on my 4S when I had it, and on my iPad 3rd gen running iOS 6 today still. Also, the keyboard constantly lags and/or misses key presses when I'm typing. This hardly seems responsive. The missed keys lead to some atrocious auto correcting. Don't forget, the iOS keyboard gave birth to the entire "Damn You iPhone Auto Correct" phenom on the web. Again, hardly lag-free and 100% responsive.
Is Android perfect in responsiveness and completely lag-free? Heck no. Is iOS? Well, only you would know your own experiences.
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Screen on time?
You practically have no wakelocks or alarms. Do you have email set to push? No social apps refreshing? Is this your main and only phone?
Ah, I never captured a screen on time... I can try to capture one next time.
But I can tell you I push three different email accounts, leave gchat signed on, and use Whatsapp constantly throughout the day. During my commute, I listen to music, browse, and play some games (nothing intensive though. I'm talking Tetris, Solitaire, the occasional Jetpack Joyride, heh).
You seem awfully skeptical about the battery life claims judging by your posts recently, and I suppose I can't blame you. But I assure you, HSPA+ is a perfect balance of speed and batteries. You'll get through a day of moderate use
very easily.
EDIT: You can sort of see the screen on time at the bottom of the graph in the pic.
I can post my usage today, if you want, but I didn't use it very much today.