Ideas for integrating client-side MVC/MVVM framework with SEO

gistfile1.md

• use angular or Backbone on client
• use <meta name="fragment" content="!"> to inform Google site is using ajax and should be crawled (see https://developers.google.com/webmasters/ajax-crawling/docs/getting-started?hl=fr and https://developers.google.com/webmasters/ajax-crawling/docs/specification)
• use backend for services that serve JSON only
• use some kind of rewrite (.htaccess, nginx) to direct traffic with _escaped_fragment_ to local instance of https://github.com/collectiveip/prerender, that reirect can be further moved to CDN
• Or, just use rendr or alike, and be done with it :)

Thank you for share this ideas. I have two questions.

1. <meta name="fragment" content="!"> is a same as add #! in the hash part ?
2. How to Google is certain the _escaped_fragment_ that the website provides is really the dynamic content the website serves to user ? It's possible the website provides some good advice via escaped_frament for gain visibility on Google search and that the content via AJAX-served the website exposed contain some « alternate content » ?! If this is not sure, it's possible a website serving content by this way are not trusted by Google than more another website static serving content ? It's not an affirmation, I don't have the response. What you thing about this ?

(sorry for the bad english level)