I remember a previous thread on Pollard, where some posters, at least one of whom claimed to have been involved in intelligence work, raised this allegation against Pollard.
I was surprised too, since the little I knew about the case had led me to believe that Pollard had been involved in sigint, and that was the type of info he had revealed.
I read some more about the case, and it appears that the story about the US agents/sources in the Soviet Union had been quite widely spread.
It seems quite clear that the real culprit in those cases were Aldrich Ames.
Well maybe some of the information came to the USSR via Pollard. But some of the Hersh article's insinuations seemed a stretch to me. That Afghan arms dealing allegation seems quite a stretch NOT to make up.