Perhaps it is an accurate statistic in context. We all know that the Organization doesn't lie, they just get creative with what they say and how they say it. For example, if the quote was "40% of all baptisms throughout the earth are the result of informal witnessing", this would be an outright lie, however, if this were a true statistic in a single area, such as the Dominican Republic for example, the Watchtower would feel as though they were being perfectly honest editing the statistic and letting you, the listener, come to the conclusion on your own that they meant it was a global statistic.