Just found this in the WL FAQs for all the R2 WLs:
When can I expect to receive an update about my waitlist status, and when will all waitlist decisions be finalized?
We will review the waitlist periodically throughout the admissions cycle and provide updates regarding admissions status in late March, early May, and early June. A candidate can expect to receive an update on their admissions status after the subsequent application round’s notification deadline has passed.
For example, a Round Two applicant placed on the waitlist would receive an update on their admissions status in early May, after the Round Three notification deadline has passed.All final admissions decisions will be communicated by early August. We discourage applicants from calling or emailing frequently to inquire about one’s status on the waitlist.
...just to spice things up