In other words you don't mind using Facebook or Twitter to log onto Quora and you want to slag people who do and want them to have to "come to terms" with your attitude. Way to go. If "no one cares" why are you making such a song and dance about it here?
The rest of your arguments exhibit appeal to authority than any compelling rationale.
"The breadth and depth of information in some of these posts dwarf all the random Mixergy, Founders At Work, etc interviews seen here on HN. For one example, search for answers by Reid Hoffman, cofounder of PayPal and LinkedIn"
Wow All of them!! Amazing ! Why didn't you throw in Wikipedia and the sum total of business knowledge accumulated by mankind while you are at it? Hyperbole anyone?.
" Amazing UI/UX design. There are so many clever small details to the user experience that it is impossible to really understand without actually getting your hands dirty and trying the product."
In other words you don't want to point out anything specifically amazing. Only you "really understand" the genius and anyone who disagrees on something even peripherally related is in the wrong and "close minded". Your gut reaction about the UI which can't be articulated is evidence of depth of perception , but when other people have gut reactions to method of registering, it is to be dismissed. Sheesh!
"Pedigree - Cofounders Adam D'Angelo and Charlie Cheever were former CTO/VP Engineering and Head of Connect/Platform at Facebook, respectively. They've managed to secure a massive investment at a huge valuation from a very highly-regarded VC firm - before launch."
None of this has anything to do with eventual success or failure of a product or startup. But you cover your tracks nicely with the "regardless of what you think of such signals, I am right anyway" bit