I started at Acquia 6 months ago, having previously worked for larger, process-heavy corporations that sold packaged proprietary, software with long release cycles. Our QA teams consisted of over 50 people (sometimes a lot more), and were always the long pole in the process, whether it was Agile or Waterfall.
Not so at Acquia.
At Acquia, I manage a lean QA team of 4 people (we have another team that tests usability), and we support 5 products. We work in an Agile environment, release every 3 weeks, and meet our quality goals for each sprint.