congratz... I don't think it will be too late... or else they wouldn't have invited you for the interview~ At least you'll find out soon after the interview if you got in or not, since it's past Dec. 1~ Good luck
Thanks for the good words.....they actually mailed the invite in Mid-november but a couple of schools had the wrong mailing address. I called them today and found out. All of the other schools told me that my file hasn't been reviewed yet , hopefully that will happen sooner than later.