Well-rounded developers should be able to document their work and communicate with others. That requires a decent vocabulary, something that learning Latin definitely helps with.
yes, people who use calculus in PERL scripts are the same people who would document their code in Latin.
neither are necessary or even desired. people with CIS degrees are the people working on help desks and doing data entry. they are not developing cutting edge encryption algorithms.
fine, when you're going for your doctorate learn calculus and latin. but for a BA in CS why not skip the higher math and try to teach them how to debug and optimise code. so that everything that they write for the first couple of years after getting their degree doesn't have to be re-written by someone with more experience.