Today I'm about to reach the midway point of the new novel I've been working on these past couple of months. I know it'll be the midway because I've plotted out the chapters ahead of time, vaguely, and can't see adding more or subtracting any, either. With this project I've taken a new approach (for me) and have forced myself to write longer chapters (for me), with a pretty constant goal of 25 pages per chapter. Usually the chapters in my work are pretty short, with an average of 7-10 pages. Go ahead-look that shit up!
I don't know if you pay much attention to stuff like chapter length when you read a book, but as a writer I'm very aware of stuff like chapter length, chapter breaks (I use a lot of those), how one chapter leads into another, etc. Individually these choices seem to help or hurt the story overall, sort of like tweaking a recipe you can't fully remember, and it's been interesting as I've forced myself to stretch each chapter until it almost feels like a short story in itself. Novels are already designed to give a big, flowing experience, but as I keep a numerical goal in mind I find each chapter branching out in unexpected ways, with little surprise passages, that I wouldn't have given time to if I was writing in shorter chapters. Given the fact that I'm such a hyper writer, I should have forced myself to take this approach a long time ago, probably back in college.
I'm sure there are writers, especially from back in the day, who write in 50-100 page long chapters. While I don't think that'll ever be my style, you have to admire that chapter length tenacity.