I applied to Cornell EEB last year so I guess I have a little bit of insight for that one...even though I ultimately got rejected. I thought I had a pretty good chance since I had been emailing back and forth with a professor who seemed very enthusiastic, and Cornell is my current PI's alma mater so he wrote me a very specific rec letter. I would have been working with one of his collaborators had I gotten in. (Looking back, though, I didn't have nearly enough research experience and my GPA isn't Ivy League material.)
Point being: Cornell EEB sends out interview invites around this time. Last year their interview weekend was the last week of January and invites went out the week before Christmas. I got my rejection by email in the middle of February. For stats: their program receives over 100 applicants. The top ~20 of those applicants will get invited to interview. About 8 people will get accepted.
Also, where are all the other EEB people on here?? Is this just a small year? It seems that there were many more prospective students last application round.