理解句子It would therefore not be too great an exaggeration to say that

你可以认为这是一个固定句型,too+形容词+名词词组.例如：She is too shy a girl to speak to a stranger.她过于害羞,而不敢和陌生人说话.也可以转换成：She is a girl too shy to speak to a stranger.
你的句子可以转换成It would therefore not be an exaggeration too great to say that
这里面还包含了一个TOO...TO...句型,表示：太...以至于...