My Brown Turkey (Improved Brown Turkey) only gets a few doubles here and there; I also noticed that my tiny in-ground Excel has one double right on top, but the rest of its figs are singles. However, on what I believe is a Kadota, taken as a green-wood cutting from a neighbor's tree in August of 2009, doubles seem to be the norm. The photo shows fruit on an airlayer I just started a few days ago, but the rest of the tree is also mostly doubles, and I took a look at the mother tree this morning and it's mostly doubles as well. When my UCD Kadota gets big enough, I'll compare the two to verify that my neighbor's tree is truly a Kadota, but for now, that's my best guess.