I had read the Menendez article, but the article that explained the fatty acids, what they do in the body, and the pathways was great. One thing I found interesting was that the British omega 6 to omega 3 ratio at 5.7:1 is so much lower than the figures I have seen for the U.S., probably because rapeseed (canola) is a more common oil and no part of the UK is very far from the coast. We still have a cancer problem, but maybe due more to widespread vitamin D deficiencies (the UK is on the same latitude as Alaska), alcohol overconsumption and vegetable underconsumption.
I found a chart that is even more comprehensive than the one you provided:
http://www.queenhill.demon.co.uk/seedoils/omegas.pdf