A family of Microsoft word processing software products for creating web, email, and print documents.
I have the exact same problem. On a 200 page Word doc that would have saved instantly in Word 2010, it takes perhaps 30 seconds to save in Word 2013. I am using multiple section breaks, built-in styles, and a bibliography which I believe is EndNote-based (so I couldn't swear that the problem isn't EndNote, but the other users here have not reported this, so I doubt it).
This is a huge problem. Is it going to be fixed? Because if not, I need to consider reverting to Office 2010.