I found this video to be very informative on the subject of the Sherman:
Myths of American Armor
Nick Moran (The Chieftain) is quite the authority on tanks. He is a Son of Ireland who served as a tank commander(I believe) in the U.S. Army during the first Gulf War. He knows his stuff.
Thanks for the link, I watched the whole thing, well worthwhile.
One key take-away: the WWII death rate for US infantry in Europe was almost 20% overall, with some divisions suffering over 100% (with replacements).
Among armored forces, the death rate was 3% and half of those were armored troops caught outside their tanks -- I guess taking a cr*p could prove deadly!
Moran makes several other important points which try to rehabilitate the Sherman's reputation and that of senior US commanders who oversaw the European campaign.