  For the wave representing particle traveling through any layer system we
calculate appropriate phase shifts comparing two methods. One bases on the
standard scattering theory and is well known another uses unimodular but not
unitary M-monodromy matrix. Both methods are not equivalent due to different
boundary condition - in the one barrier case there exist analytical expressions
showing difference. Authors generalize results to many barrier (layer) system.
Instead of speaking about superluminarity we introduce into the quantum
mechanics so called by us "hurdling problem": can a quantum hurdler in one
dimension be faster then a sprinter (without obstacles) at the same distance.
Relations between wavefunction arguments and delay or advance are shown for
Nimtz systems.
