The average trading volume is skewed from the shenanigans with HFT and dark pools, when we dropped down from almost 8, to 6, two weeks ago, and there were 38 million shares traded.
That days volume, and the remainder of the week, skewed the average volume statistics.
Remove that nonsense, and today was in fact a large volume day.
"Average" is by far the worst statisic known to man, I much prefer "median" :-)