If you're a direct applicant from outside Canada, it depends on the country you're applying from (that's all the data they compiled I think). You can check the stats on SSHRC's website.
For Direct Applicants, I received this from SSHRC after emailing them:
Good afternoon,
The results letters will be mailed probably on Friday March 8, 2013.
Direct applicants: any news on whether you made it to the next round (A-list)? Was about the same time last year that people started getting letters...