  We point out in this short communique, that be it a s-wave or d-wave
superconductor, in a non equalibrium situation(i.e. in presence of excess
unpolarised/polarised quasi-particles maintained by an injection current) the
superconducting gap suppresion by the presence of same amount excess
quasi-particles, can at best differ by a factor of 2, for a conventional BCS
superconductor. For the high $T_c$ superconductors on the other hand, there is
a huge difference in gap suppresion between upolarised/polarised quasiparticle
injection, as observed in the experiments\cite{gold}. We argue that this this
large anomaly has a natural explanation within the {\it Interleyer tunneling
mechanism} of Wheatley, Hsu and Anderson\cite{and}, and is due to the excess
polarised quasiparticles blocking the interlayer pair tunneling process. We
also point out that spin polarised quasi-particle injection in a superconductor
is a very easy way to distinguish between a s-wave or an anisotropic gap
superconductor.
