As someone who works on a game that is pretty popular I'm not sure I buy this. I'm certainly not aware of nVidia doing anything special for our game, and hones

As someone who works on a game that is pretty popular I'm not sure I buy this. I'm certainly not aware of nVidia doing anything special for our game, and honestly, they haven't really been super easy to get help from when we have attempted to ask them questions about problems that are nVidia specific that we run into. Since we are not a big publisher, it's super difficult to maintain a relationship. We will get assigned someone to talk to, and next time we actually have a problem that person will have quit / moved to a different department / stopped caring about us. Our game is in top 10 on steam right now, and is typically in the top 20 even during low periods, so I would have thought we would be somewhat higher up the priority list for specific attention if that was going to happen. So all of that is to say, we pretty much have to deal with the problems ourselves, not rely on nVidia to fix them for us. That being said, people complain about problems on AMD in our game all the time. So why is that? Forget game specific optimisations, I think it's just that nVidia has just plain better drivers in general. When we are developing new engine features, the difference is pretty clear. If you naively implement a shader, it often runs faster on nVidia initially. It's usually possible to persuade the AMD drivers to run things just as fast, but it's totally non-obvious how.