Yes Martin that's true of the Americans and Canadians also. When I had the pleasure of visiting relatives in Toronto, I was amazed at the feeling of patriotism the people had towards their country. I was equally embarrassed at the lack of such patriotism in the U.K.
Having said that, as I now live in the Highlands of Scotland, I would be loath to fly anything but the lion rampant or the Scottish saltire. I certainly haven't got the nerve to fly a Saint George flag in the garden.