Classics programs generally require more evaluated prose writing, as well as text reading and analysis, so it is reasonable to assume that they would yield benefits in actual writing skill.

However, it would be interesting to have some data to compare, for example GRE writing scores of Classics vs. CS graduates.

I don't mean to come across as overly harsh or partisan against liberal arts majors. I think the content is often interesting. I just think it should be taken along side a technical major too.

I do have a bias against overly flowery language that obscures meaning, and tend to find that more often comes from the less technical side of the academic spectrum: http://www.paulgraham.com/talk.html

I assume you haven't read many academic papers in CS? ;-)

That's a bit of a joke. Clarity is of course a primary virtue in all forms of academic writing, and one that is often ignored either unintentionally or in an attempt to impress one's reviewers and/or to signal one's membership in a particular tribe.