There appears to be a major sidewalk divide. The sidewalks fronting old row houses had yet to be salted down. Those walkways were still sheets of ice by 9:30 this morning. But the sidewalks in front of some sleek lofts in Adams Morgan were clear. Also clear were the sidewalks in front of Starbucks and Results on U Street NW. Not so clear: the sidewalk bordering the Third District Police Station. So put ice removal in the positive column for D.C.’s gentrification wave.