@Iluviaporos - That's very true. I read in the paper the other day about a man who had been farming in a clay based soil for about ten years and his neighbors couldn't believe the size and quantity of the vegetables he was producing.
He said the secret was adding really good quality compost every year to the soil and digging it in well. He started out with a top soil layer that was only a few inches thick and tended to flood whenever there was a rain.
Now it's a couple of feet thick and drains very well.
It was really interesting reading about that kind of success and how with a little bit of work anyone can create that kind of loamy soil.
It gives me hope for my own soil which has quite a lot of clay in it.