I updated my Raspberry Pi to 0.2.4.16-rc as Gordon Morehouse suggested.    Almost immediately I can see a big difference.   I now have 700 inbound connections, 4 outbound, and 14 circuits.   Before it was about 150/15/50 or so.  The download and upload rates are lower than before, but that might be because I have just restarted with the new version.  Any thoughts?