For what it's worth, some schools do not review applications in the order they are completed. Some are generous enough to indicate this to you when they e-mail you to notify you've been complete, or say so on their admissions websites.
Also, look through the threads from last year for your particular schools of interest and see when other people were complete/received interviews, especially when they have stats similar to yours. For example, I saw for one or two schools that I'm applying to, they offered people with better stats than me who were complete after me interviews right off the bat. A bunch of people with stats similar to mine who were complete the same time as me (early! sometime in July!) got interviews in September/October. So while I too am waiting on interview invites from a bunch of schools, I'm only going to start to worry when people who have stats/completion dates similar to mine get invites and I don't.
And the bottom line is...we can look for patterns all we want but this whole damn thing is a crapshoot. All we can do is pick up a new hobby while we wait and hope for the best.
Good luck to you and everyone else applying!