This can be a good thing if you are a "slush" writer, one who writes junk and then sifts it for the good things. But if you're a more "only good things, though slowly" kind of writer, getting that kind of volume actually messes up your creative potential.
I've run across many people who say that writing total drivel en masse in the hopes of cleaning up later and finding something good... doesn't work for them.
This is a good point.
I, too, found that sheer quantity isn't useful... (or hard, for me; quality is what makes me sweat!

Yes, I know how that sounds!
But here's how it works: I do not have a daily goal, just a monthly one.
I try to focus on coming up with some really good chunks of time to write great ideas before they dissipate, and go for 2,000-5/6000 per inspiration. For November I put writing first, and squirrel away from other "entertainments".
By the end of the month my creativity is flagging, but I push for a few more sprints on scenes I already know need written, and I have always finished over goal. Usually, I don't stop just 'cause I've reached 50k, but kind of coast on til the end; and then give myself a writing free month of December!
(I don't take it, but it's a nice feeling for a few days to just be like "No Writing! No writing anywhere!!")

What do you think? Does wildly NaNoing sound like it'd work for you?