Yes, a lot of ‘claims’ in that Wiki article, but a distinct lack of proof or evidence that supports it. Anyone can claim that the vast majority of medal winners, most of whom would be Russian and East European in Moscow anyway, were likely on drugs, but no one has actually provided proof to support these claims have they?
If the Russians at a home Games were covering up positive test results from their own athletes, it would make no sense at all to do the same for those athletes from the West. Rather, it would be totally in keeping with their raison d’etre for doping to show communist superiority by revealing the dopers in Western Europe, would it not?
The ‘claim’ also doesn’t explain why Such a small country as the GDR was able to produce many female athletes that could run sub 11 for 100, 22 for 200 and 49 for 400, when their peers in the West were busting a gut to run sub 11.4, 23 and 51 for the same events? Same in all women’s events and men’s field events. I lived through that period and the difference in ability between the top Russians and East Germans and the British or French teams in almost all events was blatant, obvious and at times embarrassing. It was clear to all who witnessed these battles that the GDR/Soviets were all heavily doped on sophisticated regimes. Yes there was the odd Brit and more so American that appeared to be on something too, but nothing compared to the level of those from state sponsored doping regimes.