That photo is a poor example since it's testing Internet not local wireless, however I do see wifi problems in our Surface Books.
At work, when I use Remote Desktop to access a Surface Book over wifi even in the same room, the connection is often very poor and laggy. I have to turn down the quality settings to dial-up like RDP experience or the mouse movements are super laggy and massive amounts of frames drop. If I access the Surface Book while plugged into a USB Ethernet dongle, then the connection is fine.
If I use Remote Desktop to connect to some other wireless laptop (such as an HP or Dell) that may be sitting on a table next to the problem Surface Book, the connection is full speed and full quality. So, the problem is with the Surface Book wireless.
Is there any fix for this?
Also, I wonder why they went with this odd Marvell wireless networking instead of all Intel. This is also one of the reasons Surface Books don't support Intel WiDi or vPro