Earnings release timing: hard sayin', not knowin'. A good report in the past has given a 30% pps bump and 300k traded,this has happened several times in the past. Stock seems primed for this kind of daily reaction.
I too sporadically watched yesterday's tape and noticed that after the initial plunge pricing was being moved around by 100 share blocks and like another poster on this string saw strong support @10.50 so I put in a limit bid for 500 shares @ 10.51. This joined 900 shares on the bid and effectively put in an unbreachable floor for the balance of the day. I wasn't even partially filled, even though I saw some small blocks filled at 10.52 and 10.53 for the rest of the day. 1400 shares acted as a floor on this issue, try this on GOOG or FB and see how far you get.