I have been experiencing slow speeds circa while and started to take daily measurements. I never get more than 25mbps regardless of the day or time of day. In fact, it is fairly consistent at 25mbps. I used to have the M200 and never got anywhere close to that so I dropped to the M100 so I pay for what I get and since then it has just got slower and slower.
If they are still low – boot you device into windows safe+networking mode to disable any potentially interfering software on your device - and try again.
There are many posts on here where QoS software, unknown/flaky software, old network card drivers, corrupted browsers, bad cables or other connected devices are limiting speeds on tests.
Report back what that gets.
-------------------- John --------------------
I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router +2 Airport Express's. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.