I have swatched successfully - just two off on the row gauge, which is plenty fine with me - and WASHED Mlle. Swatch as well.
This is a highly important step in gauge-swatch-making, which I've never done before. I learned my lesson might well on my very last adult sweater project: washing the swatch is really super-duper important, because otherwise you might get a sweater that grows in water like nothing you have ever seen. (And no one else has seen the sweater either, because I put it on, cried, lifted the hem from around my knees, and folded it up and stashed it away in the cedar chest.)
So: I've knit a swatch, achieved gauge, washed the swatch, still been pleased with size of swatch, and now need to cast on somewhere around 200 stitches. That's a lot, and will likely be on hold until the weekend when I can sit and do it all at once. And then the knitting begins: a me-sized sweater on #4 needles. I might be nutso on this one, because that's a lot of stitches. But in finishing the sweater, I'll knock over a mile off my stashed yarn total. (Yes, I count my yarn in miles.)