It's unclear to me since it says Gmail gets 31.2M and Google Apps (which includes email) has another 10M. Also, I think the article may be wrong, it seems like

It's unclear to me since it says Gmail gets 31.2M and Google Apps (which includes email) has another 10M. Also, I think the article may be wrong, it seems like Zimbra is only claiming 20M. Also note ajkirwin's point above, the measurements also seem to be conflated.