The core is really adaptive planning and acceptance/flexibility to uncertainty, biasing towards shipping first. There is no requirement to be spending all day in endless meetings, nor an opposition to documentation. If more documentation increases velocity, why would that be anti-agile?

More importantly, what works for you does not discredit another team's agile approach. I lead large and growing teams rapidly releasing greenfield software. We are definitively agile, and documentation is empirically key to that process. Perhaps your experience differs. I don't discredit that, merely provide my experience in contrast.