Brian I believe you're very right, but the material this website attacks is not purely Iams' work. All the papers listed are co-authored by someone from a reputable university (University of Georgia, Colorado State University, Washington State University) and most (though not all) have been published in reputable science journals (American Journal of Veterinary Research, Journal of Animal Science, Journal of Nutrition, Veterinary Radiology and Ultrasound). Hopefully this indicates their research is sound, and can be of benefit to the whole biomedical community. The time to get mad is when experiments are done, claims are made, and no research is published...!
As a side, I was quite annoyed at the last study being included on the list, as it had nothing to do with Iams - the website was clearly just digging through Iams' researcher's past publications and tried to find the most "gruesome" one they could