My mistake: SLDLs are exercises. I guess I wasn't paying attention when I made the earlier post. Also, you know when you're making gains when you see the scale moving steadily upward over time, when clothes are fitting tighter, when you look bigger in the mirror, and when people tell you that you look thicker.
If you're following most programs properly, so long as they incorporate HST principles (frequent loading, and progressive loading, be it submaxial or regular maximal load progression), you're eating enough, and haven't been immensely conditioned to the loads you're using from constant bouts of exercise with the same weight, you will be growing, like it or not.
Well, that's a bit cut-and-dry, but you get the idea.