核心问题
a good deal, not a few 都是“很多”的意思。a good few 按字面解，应当是“很少”的意思。对吗？
词典解答
a good few, 如同 quite a few 一样, 不应按字面解释为“很少”, 恰恰相反, 它的意思是 “相当多”“不少”(参见 quite a few):
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They have made a good few experiments. 他们做了不少实验。
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You'll have to wait a good few weeks. (LDCE) 你们将必须等好几个星期。