I think you missed out 'wonder' there. Check out the final part of my article for my impression of how things go, on the various difficulty levels.

That said, I was interested in doing some charting myself, to get some firm stats. However, you need to bear in mind that the initial Flood layout (which is randomized from set-up to set-up) can massively affect the chance of grunty victory. If the main Flood happen to spawn close to the Grunts, the Grunts have far less chance of winning than if the Flood spawned far away.

If I get any stats, I'll doubtless add the relevant info to my article. But also, if you care to report any results here, I'd be happy to see 'em.