Yeah I made a starter with my 1729 Scottish last week. There was no krausen really, just a few bubbles (like from when I poured the pack in). The package did expand about 4 or 5 hours after I "smacked" it though. So after two days of nothing, I added in 500ml more boiled DME. Still nothin. After one more day I stopped the stir plate and let it settle and low and behold there was close to an inch of yeast settling on the bottom. Stuck it in the fridge for a few days, used it and it has taken off nicely. I guess perhaps a yeast starter doesn't necessarily have to have a bunch of action going on to be doing its thing...