What Tony said is not entirely correct, those most people think this way. You can drape styled hair without losing all the styling but you have to adjust the dynamic controls. Usually the root stiffness, root stiffness fall off and bend resistance. I can't tell you what settings to use because it seems to vary. Usually I use a small group for testing because as you said it takes forever to drape hair. This is where I am more apt to use magnets rather than for styling.

A tip for shortening the draping time is lowering the number of vertices but then the hair can look jagged. And no, you can't lower them, drape the hair and raise them. it will wipe out your draping. Another tip is not to use the recalculate all hair (in the animation menu) unless you're going to bed and don't mind the computer being on all night. Cause you can't always stop that either. There have been times that I have save right before draping so I force poser to shut down to stop a draping.

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