It will now be interesting to see if there is a significant, and proportional, big rise in introduce yourself posts over the next couple of weeks or so.
It will be difficult to draw any solid conclusions either way but it may give some indication what 'type' of accounts these new accounts are - real people, duplicate accounts, bot accounts etc.
Tracking the path of a sample of new accounts would be interesting ... when they first post, patterns of posting / voting etc...