We recently built a site for a customer in Ember and their SEO guys were concerned about indexing. I wasn't sure how it was going to work out, but in the end Google has been able to index every page no problem.
Do you know if they sent Google a sitemap? Our client is insisting on a sitemap that has pointers to every-single-product. Something on the order of 2MM+ product pages. It seems like a bit much to me
> Break up large sitemaps into a smaller sitemaps to prevent your server from being overloaded if Google requests your sitemap frequently. A sitemap file can't contain more than 50,000 URLs and must be no larger than 50 MB uncompressed.
The site is built on Tumblr which automatically generates a sitemap for the individual posts, but not any other pages on the site. For example the "about" page is not in the sitemap, but is still indexed.