State of the Falls depends very much on the recent weather ~ obviously.
But No ~ if you stand in the right place it does look like that ~ shutter speed adjusted to create the effect I should think.
Here are some more ~ you can see that over the years the falls have been "tamed" by some work to channel them.
In full flood back in the 1920s
This one shows the last of the Mills (there were 7 in all along the river) It was pulled down in the 1950s
A Victorian Print
Taken a couple of years ago by a friend of mine ~ river was in full flood following heavy rain
From the footbridge over the river as it leaves the falls
The Church at the base of the falls. The river runs behind the wall but in front of the hedge.