Well, I've passed the midpoint on the baby blanket I'm knitting. For this pattern, you start with 3 stitches, and increase one every row. So the middle of the blanket is pretty wide. After that, you decrease one each row, so they start getting smaller. I am a few rows into the decreases now. I know the rows I've just done are still about the length of the last few I did before the midpoint, but they feel quicker. Probably a psychological thing: before the midpoint, you could theoretically keep increasing forever; after you start the decreases, there is a definite endpoint... 8^)