I would say that in my part of the country, most home are custom built. 90% are all white decora devices, 2% light almond and 2% black. A few go with Lutrons coloured plates
From what I have seen, ivory is a dead colour!.. used just a little more often then brown!
The most popular dimmer I sell is the Lutron Diva style
In some applications guys will install decora switches and regular receptacles.
