Dong-Hwi Lee, a Googler, posted in the Google Webmaster Help forums a large FAQs around indexing questions related to AMP. This is a very comprehensive FAQ around the topic and I thought it would be useful to bring more attention to this document to the community.

The questions include:

In general, how long does it take for AMP pages to be indexed and served from Search?
If I launch X number of AMP pages, how long can I expect indexing will take? What factors affect selection? (with and without the assumption that the canonical page is being crawled and indexed)
Is indexing different by page type – i.e. home page vs. product detail page?
If pages are likely to be changed or removed often, are they still good candidates for indexing?
Is there any way to accelerate the pace of indexing (for example, by creating Adwords campaigns)?
What is the impact of AMP on ranking?
Should I be concerned if only a small percentage of my AMP pages have been indexed and are surfacing in Search?
Why do two results appear (AMP and non-AMP) when I search?
Should I tag my AMP pages any differently in this scenario? Desktop site (www), mobile site (m.) and AMP pages (on m.) when AMP points to m. and m. to AMP.
Why is my AMP page not showing up in the top stories carousel?
Is AMP crawling coming off my crawl budget?

So check it out to find all the answers.

Forum discussion at Google Webmaster Help.