Politically repressed 6 year olds

Via Slahdot I ended up reading New York Times interview with Sergey Brin.  Quote:

Mr. Brin lived in the Soviet Union until he was nearly 6 years old, and he said the experience of living under a totalitarian system that censored political speech influenced his thinking — and Google’s policy. “It has definitely shaped my views, and some of my company’s views,” he said.

I’m sure they meant it different or something got lost in translation (I am not a native English speaker after all), but I don’t see how being under 6 years of age, Sergey could have been influenced by the totalitarian system.  The only totalitarian system which kids of that age know about is the system of parental / guardian control.