There's sick people in Poland too. I know, novel concept.
My neighbor finished medical school in Poland and landed Harvard Plastics afterward. Granted it wasn't the medical school for foreigners that the OP is talking about, but don't think that they haven't heard of science in Poland.
I wasn't implying that there are no pre-clinical classes by any means! In the 6 year program, the first 2 years are for basic pre-med sciences (chemistry, biology, organic chemistry, molecular biology, biostats... etc). Years 3 & 4 are the medical basic sciences (anat, physio, micro, path, pharm...etc). Years 5 & 6 are clinical rotations.