Eventual consistency, yes. What I'm saying is if a few pics disappear for a half hour while things resolve themselves, nobody is going to care... or likely notice.
It's not a bank.
By the way, I believe social networking is mostly bullshit, which is my "LOL" at the "social graph".
I witnessed one guy implement an OAuth 2.0 provider completely wrong (he was accepting user credentials as client credentials, or something similar.) This guy was smart, and just couldn't understand the spec.
Upon reading the spec, it seemed that OAuth2 is really just some rough guidelines. Pick and choose what you need for the particular flow you're implementing.
This is fairly common (liars and frauds...), though there are some great managers out there: they're just as rare as great developers, and worth their weight in gold when you find them.
Backbone... I just don't get it. It seems like there's too much complexity. I'm mainly a back-end developer, so perhaps it's just me.