Last year's LSN:
Of the 68 people marking themselves as accepted, 19 of them were accepted after March 1, 14 listed no date, and a couple had obviously erroneous dates entered.
eta: so I'm still hopeful. I did email them a month ago to ask if submitting additional information, an essay describing my reasons for attending Stanford perhaps, would be helpful and was simply told if I send it, they will add it.
It didn't feel very encouraging, however, so I decided against sending. My own little experiment. I did send a "Why Harvard after being deferred" so I'm hedging my bets, I guess to not send one to Stanford.