>>"When Apple fans talk about the product being well designed its inevitably about the physical manifestation of the product - how it looks, what its battery life is, its weight etc."
Along with terms like "It's really easy to use". The physical manifestation of any product, be it a torch, a pizza or a web based app, is part of it's design, as is the why and how of it's workings.
Not entirely; it totally depends on the source. I get what you are saying and I'd concur that good reviews/reviewers are thin on the ground. I consider the why and how to be part of the physical manifestation, but then I am an industrial design so probably not best placed to comment! I do think that, as designers, we need to educate people more about what design is. It'd help if the prima donna element weren't so vociferous, but then we could say that about most professions...