On the same day SAN had their NR last week, there were about 30 other company NR's on the Kitco website. Not sure how many people read all of them, and if they don't, I imagine they are more likely to look at stocks listed on the major exchanges, especially on a down day for gold.
As a result, I believe these results are often only being preached to the choir, and that is where the TSX listing will help.
I also own some LSG & RMX (not near as much as I do San), and they seem to get much more mileage out of results not near as good as we get here.