> I'd bet you a large sum of money this agency used Agile.

Probably not. Larger relatively successful design / marketing agencies are - based on my experience - poorly run, poorly managed, and poorly led. This gets exasperated by high turn-over (read: good people leave, dead weight stays behind).

Training, etc.? Not a priority. Revenue, it's all about revenue. They're "creatives", not business problem-solver types and presume mess and excessive friction are unavoidable.