Yes correct.
But I didn’t really say this. I said we know that the SketchUp Core Team can do it.
And I said it’s likely I (or Ken, or Thomas) could hack a window message using the Fiddle library, but this would work only for the Windows platform. I don’t have a Mac and so I don’t do any OSX hacking. 
I actually do like this idea that the tooltip is persistent until the mouse moves. It gives the user explicit control.