lucy24 - 10:48 pm on Aug 6, 2013 (gmt 0)
Here's a rough comparison:
On my (desktop) computer, your post contains 17 lines of text. It's smaller and more closely spaced than you would use in a navigation TOC, and it takes up more than half the vertical screen space.
On the other hand: some areas of my personal site use list-formatted navigation that seems similar to what you describe. I don't keep track, but a casual riffle through a few pages suggests the absolute ceiling is around 8 lines, including subheads.
On the third hand: you seem to be working with the pinterest demographic. They don't really have navigation at all, do they? More of an everything-but-the-kitchen-sink dump. Doesn't seem to hurt them.