I stand corrected - sort of - a bit more research shows the reality is "some dynamic/Ajax content" is indexed by Google, and not all search engines (i.e. Bing) are doing it yet.

For example, same search on Bing - http://www.bing.com/search?q=uiji.js

References: - https://twitter.com/mattcutts/status/131425949597179904 - http://www.biznology.com/2012/01/no-more-seo-worries-for-dyn...