No, forcing yourself to keep to a writing schedule keeps you from falling into the "I don't feel like writing" or "I really need to edit what I've got" traps. I almost always hate my story from the halfway point to the three-quarter mark, NaNo or no. (There's a joke about the progression of "my wonderful story" to "my current story" to "my story" to "my @#%@#$@# story" to "my wonderful finished story" that's very true...)
My ten-page research report due next Friday is going not too badly. I've got the introduction almost finished and now I need to invent some conclusions and then make the data support it... oh, is that not what you're supposed to do?