Here's an interesting one.  I signed up to Unotelly and Netflix UK while I was with VF as an ISP.  All worked OK, except on Netflix menus, the thumbnails are really slow to load.  No change on switching ISP to Slingshot, except when I use DHCP DNS (so, using SS global mode) on the smart TV instead of Unotelly DNS servers, the thumbnails load instantly.  This seems quite consistent - very slow performance with unotelly DNS (Auckland dynamo server).
Anyone else experienced this?