The graph on your link show the warming trends to be taking place over a 500 year period. The graph on my link show the current warming trend taking place in 27 years (and a 6 degree C. increase at that. Compare the two graphs!
As for your 'expert', who wrote the article on your link, heres just one of the articles I found about Dr Robinson:

The Oregon Institute of Science and Medicine (OISM) describes itself as "a small research institute" that studies "biochemistry, diagnostic medicine, nutrition, preventive medicine and the molecular biology of aging." It is headed by Arthur B. Robinson, an eccentric scientist who has a long history of controversial entanglements with figures on the fringe of accepted research. OISM also markets a home-schooling kit for "parents concerned about socialism in the public schools" and publishes books on how to survive nuclear war.

The OISM is located on a farm about 7 miles from the town of Cave Junction, Oregon (population 1,126). Located slightly east of Siskiyou National Forest, Cave Junction is one of several small towns nestled in the Illinois Valley, whose total population is 15,000. Best known as a gateway to the Oregon Caves National Monument, it is described by its chamber of commerce as "the commercial, service, and cultural center for a rural community of small farms, woodlots, crafts people, and families just living apart from the crowds. ... It's a place where going into the market can take time because people talk in the aisles and at the checkstands. Life is slower, so you have to be patient. You'll be part of that slowness because it is enjoyable to be neighborly." The main visitors are tourists who come to hike, backpack and fish in the area's many rivers and streams. Cave Junction is the sort of out-of-the-way location you might seek out if you were hoping to survive a nuclear war, but it is not known as a center for scientific and medical research. The OISM would be equally obscure itself, except for the role it played in 1998 in circulating a deceptive "scientists' petition" on global warming in collaboration with Frederick Seitz, a retired former president of the National Academy of Sciences.
Oregon Institute of Science and Medicine - SourceWatch

I guess you would take the word of a 'Dr.', who is questionable at best, over 100 climate experts that has ha the task of studing the global warming subject continually, full time, for the past 4 years straight.