In this article Dr. Seitz is cited as saying the IPCC altered it's report to, falsely, indicate a consensus of opinion. I remember reading somewhere that the IPCC denied this charge and cited evidence to the contrary..
Take a look at this month's Scientific American. They review the work of another distinguished Global Warming opponent - rather unfavorably.
I don't know who's correct. I just cite these as examples of why it's so difficult for non-specialists to make sense of it all.
I haven't done similar work yet on the IPCC members.