i'm not sure what you mean by late interview...feb. 20 is still very early. the regular admissions interviews started this past friday and will continue on into march. i interviewed there and they informed us there are still about 40 seats open. although from now until the end of interviews they will be inviting around 90 other people.
if you have any questions about the interview just write me a pm
i am still waiting to hear from UH as well. i submitted my application in late december. the majority of people who have received interviews so far submitted their applications before november.