that's about how long it takes me too- i can usually sit down in front of a movie and be just about to the end on a queen by the end of the movie-
sometimes i spend a week- work on it for 15-20 minutes (usually down one side) then set it aside & go back & do another side later---but if it want to get it done-and am sitting down to do it between 2 & 2 1/2 hours for a queen is about my average.