Leland Chee on Game Mechanics
Game mechanics are designed to try to match continuity to fit the purposes of the game for which they were created. They can serve to provide a scale from which to compare how one character or piece of technology stacks up against another. Because RPGs use dice, there is always the element of random chance involved, which isn't quite applicable to a book.
But stats themselves aren't created randomly; they are based on what is already known. As such, we can always look to them as a basis when writing books. I often look to RPG stats to see for example, what type of Force powers a character may have. Or if we haven't determined the stats of a particular vehicle, we can look to RPG stats for a basis of comparison.
Conversely, I think it would be a determinent if books were artificially limited by game stats. So I would agree that a book is going to overrule a stat if there is a contradiction.