Sandy loams have pretty low percentages of clay. If you look at the "USDA soil texture classification triangle" - http://www.had2know.com/garden/classify-soil-texture-triangle-chart.html - it shows that sand loams can be between 0 and 20% clay.

However, most soil surveys are conducted on a large enough scale that there will be a certain amount of inaccuracy as you found where you used to live. So you don't really know until you dig some test pits to verify.