OK, first plot of the data before I go to bed. I munged the data and plotted posts per day as a function of time. Not surprisingly, the number of posts per day have been going up since the early days. Somewhat surprisingly the maximum posts per day was way back in Feb 28, 2011 when there were no less than 16 posts! Here you go:
Staying true to its name, most days early on had one article per day. Now the mode appears to be 8 per day.