In the very customizable environment of Solidworks (whether supported or not) I'm sure it's possible to somehow customize this callout.  This is a standard hole wizard tapped hole.  I like using these callouts occasionally so that I don't always have to have a plan view showing the hole to get the info I need on the drawing in an associative callout.  I've tried modifying the cosmetic threads section of the new 2010 'calloutformat.txt' thinking that might be where this get's pulled from to no avail.  I've read through some threads indicating there might be a bug with this new section however and I'm not sure if this is the same type of thing.  Those threads seemed to all refer to adding an external cosmetic thread via 'Insert>Annotations>Cosmetic Thread'.  Any suggestions?