[MrFantastic]

1) With combos of drives its very easy to have a decent nebula speed but faster normal speed for your flotilla.

2) The plow is great for visiting the edge systems of a nebula where you often go in a bit slower but leave quickly because of plowing action.

3) The plow works better when you don't start in a nebula and when you have faster drives and when the nebula isn't thick.

The reason it 'works better in the demo' is because its small map only, in a large map with more nebulas total its much more possible to get a 'thick' nebula, which is harder to plow. (Thick nebulas are overlapping nebula, which btw are easily created by the plow)

It's not a bug, it is well know and intended by the developers.