Highly unlikely but would be interesting if Amazon releases the same data for ebooks. They might already be doing stuff like showing those pages in the preview that have the highest chance of getting the reader hooked.
http://cafe.kobo.com/_ir/159/20149/Publishing%20in%20the%20E...
Further numbers into completion rates split by region and genre also from Kobo made their way into this nytimes article earlier in the year: http://www.nytimes.com/2015/02/05/arts/international/keeping...
I'd be interested in the raw data, particularly also from Amazon based on Kindle ebook read completion though I imagine that won't get shared.
Combined with top selling book lists, this would provide a good filter to decide on potential new reads and could form the heart of improved book recommendation services.