For debugging components, I want to enter Grasshopper as quickly as possible. So I set up in my Visual Studio project as Rhino command line arguments:
/runscript="!-_grasshopper _Banner _Disable _Window _Show" /nosplash
However, the banner in Grasshopper still shows and needs to be closed by a click before I can continue.
By the way, to increase startup time of Rhino, it would be nice if there was a way to disable loading of all plugins except for Grasshopper.