I know that the tables are not static when you have the ability to create one. I guess your last sentance sums up what I suspect. Very little effect at racing speeds/loads.

When you look at a timing table you will find that in general bewteen idle and 2500 rpm timing changes mostly with rpm, and that from 3500 to 6500 timing changes mostly with load (kPa). This is why I wonder about the significance of this for our application. EDIT - looked at some more tables and there are some with more changes and less changes w/rpm and kPa on either end of the graph, obviously each application is a bit different.

The cool thing is that someone running a programable system could easily drop in a fixed timing map next time they are at the dyno, record some data, and let us know what differences they measured between the variable map. That would be neat information to see.