Besides the impact of temporary holiday hires, if the size of the labor force (employed + those who are unemployed but looking for a job) was the same in Nov 2011 as it was in Oct 2011, the unemployment rate would currently be 8.9%.
If the labor force today was as big as the labor force when Obama took office, the unemployment rate would be 11%! That means millions of people have left the labor force and have not been replaced in the last 3 years.