Yeah, only complaint I've read about the Pershing, is that it was slow. I believe they powered it with the same engine that pulled the Sherman along. Being a larger, heavier tank, you think someone would have figured that out.
It was outclassed in Korea, five years later, by the T-34, of course.
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"From our orbital vantage point, we observe an earth without borders, full of peace, beauty and magnificence, and we pray that humanity as a whole can imagine a borderless world as we see it, and strive to live as one in peace."
Astronaut William C. McCool RIP, January 29, 2003 - Space Shuttle Columbia