Few have been given the chance.这里few作为不定代词作主语没有争议。

Few people have been given the chance.这里few作为形容词（限定词）作people的定语。 Few of us have been given the chance.这里是把few of整体当作限定词还是把few当作不定代词，of us作为定语修饰few. 另外其他不定代词也有类似的情况many（of）,a lot of.