"Air to air missiles is the next big one. They're going to need to rework missile dynamics for the Hornet and F-16. I can't claim I am a missile expert, but I don't think I can ever hit an enemy fighter at 10nm with an AIM-120 regardless of altitude, speed or launch angles. So while our expectations may be off I still can't imagine what we have in DCS is even close to realistic."

https://www.youtube.com/watch?v=bZe5J8SVCYQ

Maybe ED's good missile guidance system was, but because that was subject to change, in the end, it wasn't.

Or maybe they used this video for guidance data

https://www.youtube.com/watch?v=_LjN3UclYzU

Who knows...