Anyway, I deleted all the mountains, went back and tried again. I followed the basic tutorial as much as possible, but even by duplicating the mountain bumpmap layer, I couldn't get the same "pop" that RobA (and others) seem to get, nor the same variability in peak height.
Here's the second try:
Then, I decided to try out RobA's other Mountain Tutorial in the context of this map:
Then, for kicks and giggles, I combined the two. I allowed one of the two identical bumpmaps to overlay on top of the second mountain style:
Then I tried it with both duplicate bumpmaps on the second style:
Overall, I think I like the two combined, with only one extra bumpmap overlay, the most.