PS. One more recent VE study picked from the comments, https://www.nature.com/articles/s41591-021-01548-7/tables/3

UK, VE vs delta over 90 days

  days  VEaPCRI  VEaSI
  after
  2nd
  dose

  14    85%      93%
  30    83%      92%
  60    80%      86%
  90    75%      78%

The trend makes me fairly intrigued to see the follow up at 180, 270 etc. days after 2nd dose.