From the sited report.
"In their report, the panel said it had less confidence in the evidence of temperatures before 1600, but still found it “plausible” that temperatures during the last few decades of the 20th century were warmer “than during any comparable period over the preceding millennium.”"
Plausible? Sounds like they are saying they aren't confident that 400 years ago the temperature could have been warmer than 2005. I see what they are saying from the graph. Before 1600 the gray area sure looks like the proxy data could be subject to interpretation.

Who are these deniers.
