Actually the spike is in 2010-04. I don't know that it's really related, but Drupal began switching from CVS to Git in 2010-03. I know a lot of people (myself i

Actually the spike is in 2010-04. I don't know that it's really related, but Drupal began switching from CVS to Git in 2010-03. I know a lot of people (myself included) looked at Git for the first time because of that.