I did get my 500 e-miles. According to my US account, the activity date was March 17, and the miles posted on March 24. Then the total was transferred to AA (on March 25, according to my AA account).
Usually e-miles does a sweep at the beginning of the month, so I'm not sure what to make of the March 24 date. Maybe they did an early sweep for US. Not that it matters, since I got the miles. tls