  Two seemingly distinct notions regarding black holes have captured the
imagination of theoretical physicists over the past decade: First, black holes
are conjectured to be fast scramblers of information, a notion that is further
supported through connections to quantum chaos and decay of mutual information
via AdS/CFT holography. Second, black hole information paradox has motivated
exotic quantum structure near horizons of black holes (e.g., gravastars,
fuzzballs, or firewalls) that may manifest themselves through delayed
gravitational wave echoes in the aftermath of black hole formation or mergers,
and are potentially observable by LIGO/Virgo observatories. By studying various
limits of charged AdS/Schwarzschild black holes we show that, if properly
defined, the two seemingly distinct phenomena happen on an identical timescale
of log(Radius)/$(\pi \times {\rm Temperature})$. We further comment on the
physical interpretation of this coincidence and the corresponding holographic
interpretation of black hole echoes.
