Here is the link to the article. I know quite a good deal about WWII armor and I believe that the gunner's story has some value, but others argue that the odds of the Super P coming into contact with a King Tiger were slim at best. Judging by the description of the encounter it seems reasonable. Also I was curious to see how easy it would be to mistake a Panther, Panzer, or even Tiger I for a Tiger II? I argue that with the redesigned turret, bigger gun, and up-armored hull this would have been difficult.
Misidentification was common. American infantry... And it must be said tankers frequently called any AFV a "Tiger" or Royal Tiger. Just like every AT gun was seemingly an 88. I touch upon the problems with American first hand accounts here in greater detail and provide examples.