I don't think most game shops do. Their devs typically are constantly comparing rendering on mid nVidia and AMD cards, as well as Intel integrated. The Indie titles have to do so because they know their games go for $9~$15 and they need to look consistent or at least decent or a lot of off-the-shelf laptops. Triple-A titles can afford larger huge testing teams that take on various Intel/amd/nvidia cards and report consistency issues.
Sure if the title has a huge AMD or nvidia logo when it starts, it's going to use a lot of specific functionality from that card, whatever those shops pay them specifically to advertise for. But devs need to ensure titles at least look okay and run at at least 60fps to get the largest sales audience.
Sure if the title has a huge AMD or nvidia logo when it starts, it's going to use a lot of specific functionality from that card, whatever those shops pay them specifically to advertise for. But devs need to ensure titles at least look okay and run at at least 60fps to get the largest sales audience.