https://youtu.be/I_srizrCYI8See above. My connection consistently throttles to kilobytes until I run Telus' speed test. After, and ONLY after, I run that, my speed goes to the rated speed where it will stay for the next five or ten minutes before dropping off again.
I found this out while trying to upload a YouTube video a while back and it has consistently been the case. I feel bad for people who bought gigabit but only get it when they run a Telus speed test but get silently throttled every other time.