This is late, but that pretty much sums up my NaNoWriMo experience this year. There were many days when I got nothing written, and I got nowhere near 50,000 words, but I feel successful nonetheless.
I have been working on this project off and on for almost 10 years now, stuck on the same 1,000 words or so. In one month, I wrote 15,113 words, more than 15 times what I had before. And I haven’t even incorporated the original 1,000 words that inspired the whole project.
I am going to keep working on it — give me another 10 years, and I might have a novel for you. Actually, if I can maintain even my (very slow) NaNo pace, it might be a novel in six months or so. We’ll see.