I said "casual reader", not "speed reading monster"
I think you've got a bit of a wrong idea about Plaescape Torment. It's often seen as having the best story in any game ever. If this game had been a book (if that would be possible, capturing all the different paths you can take through the story, and all the different endings), then it would / should have been a fantasy classic as big as LotR.
I think it would have been a classic even if they'd created a novel only describing one path, toward the most epic ending

Planescape Torment contains over 800.000 words of dialog