If you read the whole article, I believe Moris adequately explains why this could not be the problem if the poll takers were not new to the task. I believe this team had the experience to know how to do it correctly.
I subscribe to the idea that somehow the poll locations got out to the Kerry friendly and they dumped phony (non-voters) into the places with the intention of volunteering to be interviewed. To prove this, some of them need to come forward, and if they are highly motivated to cheat, they will likely be highly motivated to be quiet. but this is likely what happened. Fortunately the electorate did not bite.
"Fortunately the electorate did not bite."
In the course of election day, I met two different elderly Bush supporters who had became extremely depressed and scared when they heard those skewed exit polls projecting Kerry the winner. Anyone who would falsify thse polls is playing with people's minds and health.