Me neither and I wish I could tell you why.
The best person to ask is Brent, as he is currently the Premier Butterfly cue maker around these parts.
I know what you mean but think that is more common on the cheaper, and I mean much cheaper, J&J breakers and jump cues and other types.
I doubt that you would see any or as much on a professionally built butterfly.
You could make another post in the Ask the Cue maker Forum and go to Brent's site and have a look at some really, really, really nice ones.
Here is Brent's web site. I think if you look closely, you will see that the points do what might be called as Feathering out a bit. As the blocks, or points get turned down to create the Butterfly effect, the points are the thinnest at the point.
Feathering but not bleeding into one another.
http://bhqcustomcues.sharepoint.com/Pages/default.aspx
Hope Brent doesn't kick my butt for calling it feathering.