Very much agreed. From a HN account that isn't immediately associable with the source of the story, this is little more than astroturfing. It's not as if they're unheard of on HN in the first place.
Since when have most companies or people affiliated with companies disclosed the fact in the title of the submission to HN? I hardly see how this is misleading, the opening paragraph discloses the fact he works for Parse.
It seems like we just need a wrapper that lets you pick whether to use Parse or Backbone. That should eliminate the worry of lock in (you'd still have to add the server code if you convert away from Parse, but you'd have to do that anyway).
A) if you don't use Parse you're going to have to write server code.
B) If you do use Parse and decide to change in the future you're going to have to write server code.
The outcome is the same however with option B you will have a working app 70% faster. Parse is great for moving fast while you search for product/market fit.