No updates on that number yet.
However, if USCIS receives > 20,000 exempt cases on April 2 and April 3, USCIS will first conduct a lottery to select 20,000 applications. Remaining applications not selected will be a part of the bigger 65k lottery. Thus people with US MS/Phd would have 2 chances.
I just hope that MS quota doesn't fill up in first couple of days