Yes, and that book would be a wonderful example in a class on polemic because any relationship to the truth is incidental to its purpose. It ignores the modern science of psychometrics and the vast majority of the material it deals with predates the 60s. Outside of the areas where Gould was an expert ([snail] paleontology) I would actively avoid reading anything by him. If its valuable, someone else would have picked it up, but if it's directly from Gould it could be a rehash of something someone else said better more than a decade earlier that he never cited.[0] Please note that in that case I'm assuming incompetent literature review, not plagiarism. But we also have what looks like another example of politically motivated incompetence or fraud[1]. For specific criticism of Mismeasure of Man look here[2]. For criticism of Gould's general importance as an evolutionary theorist, I quite like this

I am not sure how well this is known. I have tried, in preparation for this talk, to read some evolutionary economics, and was particularly curious about what biologists people reference. What I encountered were quite a few references to Stephen Jay Gould, hardly any to other evolutionary theorists. Now it is not very hard to find out, if you spend a little while reading in evolution, that Gould is the John Kenneth Galbraith of his subject. That is, he is a wonderful writer who is bevolved by literary intellectuals and lionized by the media because he does not use algebra or difficult jargon. Unfortunately, it appears that he avoids these sins not because he has transcended his colleagues but because he does does not seem to understand what they have to say; and his own descriptions of what the field is about - not just the answers, but even the questions - are consistently misleading. His impressive literary and historical erudition makes his work seem profound to most readers, but informed readers eventually conclude that there's no there there. (And yes, there is some resentment of his fame: in the field the unjustly famous theory of "punctuated equilibrium", in which Gould and Niles Eldredge asserted that evolution proceeds not steadily but in short bursts of rapid change, is known as "evolution by jerks").[3]

[0]http://lesswrong.com/lw/kv/beware_of_stephen_j_gould/

[1]http://www.wired.com/wiredscience/2011/06/gould-morton-revis...

[2]http://en.wikipedia.org/wiki/The_Mismeasure_of_Man#Criticism...

[3]http://www.pkarchive.org/theory/evolute.html