Depends. Technically HKN is a LitRPG, but I don't ever refer to the stats. I use them off camera for personal reference, but they don't exist in the universe, even if the physics reveals it.
Did you know that if you calculate pi for a square it is 4?
The more sides you give an object, the closer and closer it gets to 3.14~
So if you fight combat on a grid, spheres become rather STRANGE.
My point is, I feel a real LitRPG is a story where the game mechanics are PART OF THE STORY. Not just stats because, that really is the basic bitch of LitRPG. A real LitRPG is about rules abuse. How to MinMax your character. How to abuse the system. I forget the name, but there was this great LitRPG where the guy wound up in the game and went, "FUCK." Then immediately went about abusing the game.
He went to the local church, went into the confessional, then started walking into a wall. Why? To level his stealth.
He went into a dungeon, fought to the end, then ignored the boss encounter. Why? The drop sucked. But this Candle outside the Boss Room? It was alive. A bit of a joke really. But it had ten thousand Hitpoints and massive damage reduction.
So he proceeded to spend hours chopping it free from the wall. Then he took it home, let it heal, and went back to chopping it, every Single DAY. Why? So he could speed level his melee score.
THAT is LitRPG. Where the Rules of the Game are a character in your story.