For you Sock Knitters…you know who you are!
You should check out All Tangled Up’s website. It’s one of my consistently favorite blogs. She is weighing sock yarns and comparing the weight with what is on the label. A lot is pretty surpising. A couple of grams here and there on a dk or worsted weight yarn may not make that much difference…but in sock yarn, it could be the difference in an unfinished second sock…especially if you’re knitting top down. Here she is http://www.alltangledup.com/