Is it just me or is the pink (flowing into orange) the main areas of the civil war?

I mean, compare: http://www.acws.co.uk/about/images/secede.gif

http://etc.usf.edu/maps/pages/5200/5292/5292.htm

http://etc.usf.edu/maps/pages/7400/7489/7489.htm

http://etc.usf.edu/maps/pages/800/809/809.htm