Its not a medium tank gents
"It was designated a heavy tank"
https://en.wikipedia.org/wiki/M26_Pershing
I've heard it was called "heavy tank" to encourage Americans during fights. They were facing Tigers and other heavy stuff and to keep their morale high the highest command of US army ordered to call Pershing heavy tank.
But back to topic:
I doubt there's misconception about Pershing. It may seem a weaker tank (despite roughly the same cost what @Grim reminded), but I think you need to look at what this tank is supposed to do and what kind of support it has. It is no wunderwaffe (so isn't Tiger), it won't solo all your enemies. It's intended role is AI and I think it does great against infantry. I even fear Pershing more than Tiger due to smaller squad sizes of Axis.
EDIT: Pershing seems a bit easier to rank up, does anyone know exp requirements for both tanks?
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