same problem here with the same type of surface. Tried everything from Webapp to ... I don't know. I often use Confluence or Powerpoint or Excel within my meetings. All these apps start very slow an react very slow during a G2M session.
While we currently investigate failure reports of this nature, on certain processors that may handle GoTo information differently, I can also offer a special rendering patch that you can test on your Surface tablets if needed.
Please click my Community name and send a message if you'd like to test out this patch. Please confirm your email spelling so I may send the attachment privately, outside of the Community itself.