My experience is similar to, and actually slightly worse than yours.  There is a sticky message in the section above  on this forum with guidance on maximizing speeds.  It's probably worth trying them if you're not already practicing them as a matter of course (they're pretty elementary).  They did not help me.
Some seem to report good speeds.  More speeds like ours.  I suspect the latter is the more common (since it is my experience  

).  Most people, though, don't really know what to expect.
Good luck.