Yeah, you're probably right. I tried them for NaNo, and they worked for a while, but there was too much physical fiddling around with finding a pen or drawing pins or shuffling or the right colour card and so on, as far as I was concerned. It took my focus off the actual story they were laying out and onto making the process work, whereas a spreadsheet just works for me.

*shrug* Different strokes for different folks, I guess. :)