Please check the data provided by CIC as of May 19 -
http://www.cic.gc.ca/english/express-entry/rounds.asp
As 415 was the CRS cut off for the May 17th draw, nobody existed above 421 on May 17, but on May 19 (2 days after the draw), there are 347 people with CRS 421 and above. That is an average of 170+ folks getting added per day with 421 CRS and above!
Comprehensive Ranking System (CRS) score distribution of candidates in the Express Entry pool as of May 19, 2017
CRS Score Range Number of Candidates
601-1200 50
451-600 136
441-450 51
431-440 59
421-430 51