s-pen GUIUtility.BeginGUI performance problems

When using the s-pen on the galaxy note I am seeing a huge performance hit, this is not present when touching the device withotu the pen.

When I profile the game the main cause of the drop seems to be from GUIUtility.BeginGUI which spikes to ~38ms when the pen is touching the screen, when i touch the screen with my finger the same area shows as ~1.6ms

The galaxy note is a taget device for this game so i need a workaround for this. The game built around unity 3's GUI system.

This problem was not noticed until after the device was upgraded to icecreamsandwitch