Well I spoke with the Transfer Admissions Committee on Friday which Mr. Birney heads, and the official date has not been set. Basically, decisions will not be released before May 21st, but that does not mean decisions will be released on the 21st. We continue to say "end of May" for transfer decision release.
Additional update information for transfer applicants was included in my most recent Hopkins Insider post:
Hopkins Insider: Update Time: Wait List News / Transfer Happenings / and LOST Theories