Yes, I know the NICs for ethernet and WiFi are different I listed out that I even used different branded devices getting the same speeds. For example the surface books wireless chipset is the Marvell Avasatar 88W8897 which boasts the following features:
IEEE 802.11ac (draft) compliant, 2x2 MIMO spatial stream multiplexing with data rates up to MCS9 (866.7 Mbps)
Bluetooth 4.2 + High Speed (HS), supports Low Energy (LE)
Near field communication (NFC) connectivity technology, per NFC Forum specification, for short-range, contactless communication
It would make sense if the issue I was experiencing was tied to one device but looking at every NIC topping out at 100mbps even on a laptop less then a year old? Seems unlikely.