  A strong correlation is reported between gamma-ray burst (GRB) pulse lags and
afterglow jet-break times for the set of bursts (seven) with known redshifts,
luminosities, pulse lags, and jet-break times. This may be a valuable clue
toward understanding the connection between the burst and afterglow phases of
these events. The relation is roughly linear (i.e. doubling the pulse lag in
turn doubles the jet break time) and thus implies a simple relationship between
these quantities. We suggest that this correlation is due to variation among
bursts of emitter Doppler factor. Specifically, an increased speed or decreased
angle of velocity, with respect to the observed line-of-site, of burst ejecta
will result in shorter perceived pulse lags in GRBs as well as quicker
evolution of the external shock of the afterglow to the time when the jet
becomes obvious, i.e. the jet-break time. Thus this observed variation among
GRBs may result from a perspective effect due to different observer angles of a
morphologically homogeneous populations of GRBs.
  Also, a conjecture is made that peak luminosities not only vary inversely
with burst timescale, but also are directly proportional to the spectral break
energy. If true, this could provide important information for explaining the
source of this break.
