[ipince]

Those graphs were really confusing.

The email volume line graph. Are those data points per hour? every half hour? How can they have a seemingly continuous line graph for this histogram-style data?

The "<20 words" graphs.. they don't look cumulative but the labels make them seem like they are. The correct labels should be, for example, "20 <= w < 30".

[bob_g]

Great points - a histogram might make more sense with the email volume graph and the labels for # of words can be improved for additional clarity.  Thanks for the great feedback - please let us know if you have any more.