I remember when Rosas took the dance world by storm with that dance. So revolutionary, people said, to use gesture in unison! I remember thinking the hype was overblown back then. De Keersmaeker had taken a basic idea, explored by many others, and made an especially effective piece with it.
Looking at the Google translation of De Keersmaeker's statement, I notice that she points out that it took popular culture "30 years" to pay attention to her groundbreaking avant garde work.
Her actual grievance may be that it took that long for her to influence popular culture!