Doesn't matter to me -- right now I've only been knitting about a month, so I can't quite picture what the chart is going to look like. In fact, I found that it was best to chart out the pattern on graph paper myself, but not so I could follow it...it was to make sure I understood how the stitches worked together, not so I could see how it would look. Sort of backward-engineering. (Sad, I know.)
I imagine that with experience, I'll be able to "see" the lace in the charts and they'll be more useful to me.