Report Abuse. 20 Mbps (megabits per second) is very fast. 20 Mbps download speed means that you can download at 2.5 MB/s (megabytes per second).It must be quite expensive. With Rogers, for 25Mbps download and 1Mbps upload, it's $69.99 CDN. For surfing the web and watching shows online, 3Mbps-10Mbps is enough.eport Abuse. 20 Mbps (megabits per second) is very fast. 20 Mbps download speed means that you can download at 2.5 MB/s (megabytes per second).