Lipless crankbaits... Help me understand??

[IAFrogger]

I am totally new to fishing these lures... but really want to give them a serious try early this spring. I am a bit confused regarding the presentation of these lures. I have always been under the impression from what I have read that when fishing colder water ie. temps under 50 degrees that a slow presentation is necessary. Seeing that these baits sink like a rock, how do you fish them without cranking them relatively fast? Everything I have read talks about fishing them relatively fast with variable retrieves, etc.....

Also is it a bad idea to use braided line with these types of lures?

Any insight you can give me on fishing these in colder water would be greatly appreciated..