I thought for 1/8th scale you mostly want a little toe out due to the fact that it is 4 wheel drive, since the front wheels can pull the buggy. Toe in on 1/8th scale would lose quite a bit of steering. In 2wd you mostly want toe in, because the front wheels do not pull the buggy to keep it stabilized with toe out.
Then again, in Europe it does not seem like the tracks have a lot of 180 hairpins and such. So maybe toe in is more suited for grass and sweepers.