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If you read the text on the page that you were referred to (telus.com/networkmanagement) it says:
Keep in mind that the measured/experienced speed will be the slowest component of the end-to-end trip. If the server is busy then it may not be keeping up with the full capability of your Internet connection. Similarly, as an example, if your client device is on WiFi then it may be slower (at times) than both the Internet connection and the server. WiFi speeds depends on many external factors that can change over time like other connected devices on the same WiFi, noise from neighboring WiFi on the same channel, etc.