This isn't meant to be a slam against Apple (because I love Apple), but the reason people pay a premium for their products has nothing to do with logic. It's never about numbers, specs, or processors. It has everything to do with how you feel using the product. And no one, bar none, does that better than Apple. It's completely about the user experience. How I feel when I open my MacBook Air, how I feel when I grab my iOS device to do something...it's difficult to put into words. In that regard, it is kind of like religion: it defies logic, but makes some people feel good.
Yes, I use a Dell laptop for work, and my work-provided Galaxy S3 out-specs my iPhone 5. But, in the end, I am stuck using Windows and Android. There is zero emotional attachment to these devices. It's just the way it is for a lot of us.
I don't see how your post could ever be taken as a slam against Apple. It is an extreme compliment in my view, and for the most part exactly right. I think sometimes people buy Apple for specs alone, such as Retina iPads or MBPs. But the biggest factor as you mention is overall design integration of hardware/software. No one makes their users as happy with the overall concept and delivered product as Apple does.