We can safely expect a bulk of the invites to go out in the next 5-10 days. They need to release the decisions by the 16th (if I remember correctly) and they need at least 2-3 weeks to collate all the information and take decisions. This implies that most interviews should have been conducted by the last week of November; which further implies that most invites need to go out in the 2nd-3rd week of December so applicants can schedule interviews within 2 weeks. Ergo, bulk invites go out this week and next.
Of course, the tragedy with Stanford is that even if you don't get invited by 3rd week of November, you will still be hanging on with a sliver of hope till 1st week of December!
Never have I realized the extent of the importance of closure as now.