Is Acquia Drupal a fork of Drupal?
No, and Acquia works continuously to ensure that such a thing never occurs. All Acquia created patches are submitted back to the Drupal project in a timely fashion. Acquia engineers work closely with core maintainers and contributed module maintainers to ensure that there is little or no divergence between Acquia Drupal source code and the source code of available on Drupal.org. Given that source code divergence creates costly duplicated effort for the Acquia engineering team, Acquia is highly motivated to minimize or eliminate it.
