They are not running third or better in polls when offered up so their significance is far less consequentialGingrich is running fourth in several polls and should also have been a choice.
When you have almost a qtr of all votes being cast for two potential nominees in numerous other polls not even being listed in this poll it makes the divined support for the candidates they did choose to list highly suspect.
Well give it time. Survey USA is a pretty accurate pollster (unlike Zogby - and besides this is only one state). I sure if they did a general election poll Thompson would be in it.