I been using Android powered BlackBerry smartphones since launch.Generally the updates are sent to devices in the 1st week of the month .I think the delay in the last two months was due to it being holiday season .
I do work with BlackBerry but not employed by them .
I do liaise with the BlackBerry community online so basically that's how I know when things drop.
I'm also a beta tester for BlackBerry for many years which anyone can join at
www.blackberry.com/beta
The security patch update are sent to beta users a week prior to the new month .
I do get stuff from BlackBerry before announcements but it's under NDA.