Asimov vs. Heinlein, liberal vs. conservative?

Megan McArdle has an interesting hypothesis:

I wonder if those who read science fiction in childhood can be divided into those who liked Robert Heinlein better, with his swashbuckling individualism, and those who preferred Isaac Asimov, with his technocratic fantasies. And I wonder if those early preferences semi-reliably map onto the conservative/liberal divide . . .

Count me as one data point in support of McArdle's hypothesis. I read both Asimov and Heinlein as a teenager, and enjoyed both, but Asimov was my favorite SF author.