Didn't this also depend your own network infrastructure somehow? For some users it can be extremely slow like that few hundred kilobytes per second in the screenshot, but for others it isn't that bad.

When I try to download the SpeedDreams_2.0_data.zip from MorphOS Storage (I assume it's the same file/location), I get full speed with my 10/10Mbps network.. OWB reports steady 1.2MB/s with my Mac mini.

Wifi is a different case, but with cables I've always got good speeds on MorphOS systems.