We reported literally thousands of bugs that were specific to the PC version relating to the frame rate. All sorts of fucked up texture issues. The Batmobile in particular has always fucked things up on PC.

"Testing a game this big is very different from linear or smaller games," our source continued. "You usually get a mission, chapter or area of the map, or pick one yourself, and just go to town. You bug everything you see. We had some testers bugging more than 100 bugs per day. Devs would fix what they could but they were juggling that with actually finishing the game so they were insanely slow. Only when the game was done and no new features had to be built could they actually buckle down. Once that happens they also restrict what you can or can’t bug, to ensure that they can catch up."

Our second source said Warner Bros. internal QA focused on bug-checking specifically at 720p resolutions. Most PC players with decent hardware expect to run games at 1080p or higher. If Warner Bros. was using 720p at as a benchmark, that helps explain the large performance gap.