Rogers does have Speedboost which provides for higher download speeds for a few seconds to allow websites to refresh faster, etc. I know that when I do a speedtest it is much higher than I pay for. However, when I download a large file, the speed starts high but ramps down to what I pay for after say 10 seconds. I see this when I update my Garmin GPS where the file size was 7 GB on the last download. I'm on Rogers IgniteTV 150/15 and the 7GB took a bit over 5 minutes. Remember 7 GB = 56 Gb.
Last year when I was on 300/20 the download took around 2.5 minutes. When I switched to IgniteTV, I lowered the DL speed because I didn't notice any difference and it saved me over $100/year.
There are only 2 of us at home, and we never run into issues. Remember that an HD stream utilizes about 10 mbps and even 4K is about 25 mbps.