2010 increase in temps varied by less than .1*C by all the reporting agencies. Hadcrut had an .498*C increase over their average. NOAA took the highest increase spot, had about a .6*C increase over their average. Both of these numbers had an +/-.1*C margin of error.
Our temps have increased about one half of one degree celisus. Logically it's hard to think that one half of one degree celisus could not be a natural variation in temperatures.