Our family recently downgraded our internet connection, which limited our upload speed to 1Mbps. According to the Tor relay doc, a minimum of 2Mbps is recommended, yet a relay is considered "fast" if it has 1Mbps.
I think you misread the documentation. 2Mbps is a recommended minimum, but a relay is considered fast if it has 1 Megabyte/sec and Megabit (Mb) and Megabyte (MB) are not the same.
Will I be hurting more than helping if I run a relay on this connection speed? Should I run a bridge instead?
With 1Mbps, you have 125 Kilobytes/sec upload rate. I would say yes, run a bridge instead. But let's see what other pepole say, eventually.
Michael Armbruster