Atleast that's the case from most of the matriculating students! Not 100% confirmed! but I guess UCSD is still short on filling this year's seat. UCSD is doing rolling admissions, which means they don't set a particular cut off date until they fill all the seats. Hope this helps! The turnaround time after you interview is about to weeks, so if you haven't heard any info back from them send a courtesy email and push for a decision!