Windows Phone 7 may be missing features and apps; its stark styling may not be to everyone's liking; but at least it's fast. It flies on a 1GHz Snapdragon. The newer Qualcomm SOCs can only be faster.
I'm not sure what you mean by 1:1 touch detection. At least I've never noticed a problem on WP7 with touch sensitivity (my phone is a Samsung Omnia 7).
I particularly like the pseudo-3D design used for button highlights. The Windows Phone 7 "Metro" design doesn't have button gradients that could be used to highlight a depressed button. Instead, they've come up with a clever visual cue: the button slightly rotates in space as you press it. As you move the finger on the button, the axis of rotation changes accordingly. It's a clever little trick that makes it feel like you're exerting an actual physical force on the object.
My WP7 Samsung Focus is incredibly snappy. I've never seen it hang or pause, even when dealing with poorly made apps.
As mentioned, not everyone will like the interface. But I find the interface intuitive and really accessible. Everything I want to do is within one click or one swipe.
Heh, ok, I suppose its more accurate to say "One click or one swipe + (maybe scroll) + click"
My commonly used apps/games are pinned to the homescreen, everything else is on the app menu one swipe away. I've never used another smartphone so I don't know if that is comparable.
