So the initial test was with the SuperHub 5GHz radio set to 802.11ac with the channel width set to 20/40MHz I get 600Mbps link speeds on my wireless devices.
Just a note about the Hub 3's connected devices link speed. I wouldn't rely on that as your sole source of information (we had some trouble with it during the trials). It may not be accurate for many reasons. I would read the link speed from the actual device, if possible. This is easy to do on laptops. For my Android device I use the inSSIDer app, which may or may not still be available for free.
The Asus may be more accurate, but again always check what you're seeing on the actual device where possible.
Adding onto my previous post, I still get 200mbps download over Ethernet but around 30-40mbps over Wi-Fi connected to a 5GHz Access Point. Wi-Fi isn't coming from the SuperHub 3. I took the exact same access point round to a relative's house who has 200mbps broadband but not a SuperHub 3. Guess what, 200mbps download over Wi-Fi!