Slapped wrist for the Reg
I wondered about that 13% too, so I went looking for the original survey
The actual question was "What do you like best about your iPhone 4s?", with multiple responses allowed.
So saying Siri is the feature that punters like best is ok.
Saying third party apps and iCloud "Appeal" to only 13% and 19% respectively is not ok; it's misleading.
If you ask me what I like best about my phone and give me an open choice, I'll probably pick the ability to make calls and that it fits in my pocket. It doesn't mean it's not stuffed to bursting with third party apps.