David Storey 18 December 2012 Great article Rachel. Not directly related to Grid layout, but may be useful for your demos: In IE10 using the Metro UI (or whatever it is now called), you can not resize the browser window, but you can put it in a split view, where the smaller docked window is always 360px wide. This view ignores meta viewport, so all of the adaptive demos will render as If they used the widest query. It does support CSS viewport however, so if you use @-ms-viewport, the grids would adapt to show your skinny mobile optimised grids. See http://dev.w3.org/csswg/css-device-adapt/ for details.