A typical Gmail user receives about 5 emails a day

"All of the decisions revolved around the central fact that a typical Gmail user was receiving only about five emails per day, most of which were of promotional nature, and as such, required no response. This was in contrast to a typical Googler who received an average of about 450 emails per day, many of which were important to at least read, with a good chunk of them requiring a reply."
Source:  TechCrunch, 16th November 2014
Note - I'm assuming typical means modal...  & I'm assuming 'user' means 'account' - e.g. one person could have multiple accounts