My suspicious is that Google sees them all.
Even when you no-index pages, they are crawled and saved in G memory. Nothing to hide from their eyes if it's online. Of course, no-index means no-ranking but the questions are:
1. Are these pages perceived as empty pages?
2. Does Google takes it into consideration when ranking a site (say amount of no-indexed pages)?
Most importantly, when these pages are finally indexed, do they start from the lowest level of ranking, getting a "hard time climbing up the ladder" or do they considered fresh?