Android growth in the US is still significant but may have slowed down at the start of the fall, according to new comScore data. Google's mobile OS climbed to 23.5 percent in October, or 6.5 percent more than July, but a more modest 2.1 percent over the past month. If sustained through the rest of 2010, it would still be a high rate of growth but would still represent a rare dip in Android's pace at 6.3 percent.