I love waterfall shots and they are quite fun to do. You have done well with this one too. Your exposure here is right on the money. You did not over expose the water. There is still enough detail in it to see the water nicely. As I look at your camera settings for this shot, I can see that you are definitely in tune with what needs to be done on a shot like this. I generally use Aperture priority to get a longer shutter speed on shots like this rather than shutter priority.
I have a friend that does waterfall shots professionally.... You can see some of his stuff at //www.kevinadamsphoto.com if you are interested. He speaks at our camera club about once per year and he has two waterfall photo books out now.
The only 'risk' I see in this waterfall shot is the choice of black and white. Most viewers are going to beg for color on a shot like this.
Now thats how you do a waterfall. I am shocked to see so meny people that dont know how to shoot moving water. maybe this shot will drive that point home. vote +9
the black and white (IR?) was a good choice. people are gonna lecture you about the rule of thirds, but the central composition really makes this piece. the idea of the waterfall was not very creative, but the execution is marvelously done. 9