really? i found that, even coming to it after, dance has helped my footwork and movement immensely. and to 'develop body awareness for yourself and partner' sounds like something that would come up often in sparring, chizau, etc....
I wasn't doing martial arts at the time, so I didn't really have the opportunity to think "wow, that salsa class really helped my footwork" or something similar. As for reading a partner, that is a bit different since in dance you are TRYING to give each other cues about what you are going to do next, martial arts is all about hiding those cues. Also in Latin the male is the lead so he does less reading than the female.
Lamont