set fnSetColumnVis() animation duration like .hide('slow')?

I checked the API doc and I searched for this first, but could not find anything.

My project has some pretty simple tables with show/hide columns, much like this example:
http://www.datatables.net/examples/api/show_hide.html

Since the show/hide is an instant on/off, the user does not follow along with what is happening. They notice the table is less wide, but not sure what's missing.

I think I might get them up to speed quicker is the hide/show was animated, similar to using jQuery .hide('slow')?
Is there a way (or could be) to set the duration on the fnSetColumnVis()?
Perhaps a separate function does this, or one of the plugins?

Thanks for any help.
-Kimball