Maybe... But I don't such problems. I assume the architecture of all Surface Pros are the same.
I am using a Logitech Bluetooth mouse http://wirelessworld.allalla.com/wp-content/uploads/Wirelessworld/Wireless-Mouse/Logitech-Bluetooth-Mouse/Logitech-Bluetooth-Mouse9747.jpg
Even if I transfer big chunks of data (HD Movies) I dont't have any lag.