That is correct. Looking at the Recommended Printing Parameters which I find to be pretty spot on (http://www.kudo3d.com/recommended-printing-parameters-exposure-time-lifting-height-lifting-speed/)
You’ll see that at 37µm (the highest resolution, but also the smallest build size) that the layer cure time being recommended is 3 seconds for Z of 30µm or 4 sec for 50µm.