Yeah, the kind of climate change the opponents of global warming cite happens on a timeline of hundreds of hears with temperature variance of just decimal points of a Celsius degree.

Quote Originally Posted by International Panel on Climate Change
Thus current evidence does not support globally synchronous periods of anomalous cold or warmth over this timeframe, and the conventional terms of "Little Ice Age" and "Medieval Warm Period" appear to have limited utility in describing trends in hemispheric or global mean temperature changes in past centuries. With the more widespread proxy data and multi-proxy reconstructions of temperature change now available, the spatial and temporal character of these putative climate epochs can be reassessed.
http://www.grida.no/climate/ipcc_tar/wg1/070.htm


The climate change referred to in the theory of global warming has happened during the past two centuries, and the spectrum of temperatures is increasingly hotter than in previous events of global warming periods.