  The CERN-SPS accelerator has been briefly operated in a new, lower intensity
neutrino mode with ~10^12 p.o.t. /pulse and with a beam structure made of four
LHC-like extractions, each with a narrow width of 3 ns, separated by 524 ns.
This very tightly bunched beam structure represents a substantial progress with
respect to the ordinary operation of the CNGS beam, since it allows a very
accurate time-of-flight measurement of neutrinos from CERN to LNGS on an
event-to-event basis. The ICARUS T600 detector has collected 7 beam-associated
events, consistent with the CNGS delivered neutrino flux of 2.2 10^16 p.o.t.
and in agreement with the well known characteristics of neutrino events in the
LAr-TPC. The time of flight difference between the speed of light and the
arriving neutrino LAr-TPC events has been analysed. The result is compatible
with the simultaneous arrival of all events with equal speed, the one of light.
This is in a striking difference with the reported result of OPERA that claimed
that high energy neutrinos from CERN should arrive at LNGS about 60 ns earlier
than expected from luminal speed.
