I almost forgot about this thread.
Bri, I wouldn't say it kills the movement, just changes it's feeling. I like fast shutters for action/power, and slow for that calm/tranquil feel, both I feel can portray movement though, if done properly.
Speaking of powerful, I love your "Na Pali Coast #81" Bri, well done. Would love to see the uncropped version. If it all possible that shot 'might' be even better using the golden rectangle and having the wave set within it at the proper ratio. I also liked it better than your "Life at the Edge" shot. The "life at the edge" shot is a brilliant shot but I think I'm personally just cooked with sand dunes, everyone seems to have done them. Still, a remarkable picture, looks like an oil painting.
Here's a few recent fast shutter shots. I was looking at wave movement, and attempted to freeze the waves form from perspectives most people don't usually look at them. To get these though both the camera and I got wet (not intentionally) but hey, that's what it's all about right, getting into the environment you're shooting and putting your camera in a different place?
Critique.
This first one I thought was kinda neat, the wave caught an air pocket. What I thought was cool was how, if you look at the base of the wave, the air was pushing back on the water at the base and it left a depression.