Wow really? If thats the case, then everyone's wrong and call of duty 4 copied call of duty waw's engine then, not the other way around. treyarch should really step up and get the credit they deserve.
Actually, no.
Link
To point it out:
''Based on the Call of Duty 4 engine, Call of Duty: World at War will include more destructible environments than prior games in the series. It will also allow players to swim underwater, as well as use Japanese machine guns and flamethrowers with "propagating fire" burning jungle scenery--and enemies--in realistic fashion.''[/]