I'm quite happy with my first week. I ended up writing 11,000 words in 7 days.
Now on first sight, that sounds pretty fantastic. Going at the rate, I could complete a Middle Grade novel in three weeks, or an adult novel in seven. But consider that when I first started playing with writing sprints, I was hitting around 3,000 words a day. If I'd continued like that I should be closer to 21,000 words per week. That would mean a Middle Grade novel in ten days or an adult novel in three and a half weeks.
Of course, there's a little more to a novel than writing fast. Part of successful writing sprints is knowing what you are going to write before you get going, which means a lot of planning and pre-writing. So you have to add that into the mix - does that count as writing every day? If it does, I'm laughing, because I jot down ideas and scenes all the time. It doesn't result in word counts, and sometimes it's just doodles on paper, but it is development and creativity.
The other thing about writing quickly is you get lots and lots of errors. The theory is sound - Most of what you write in a first draft will be rewritten or deleted.
But I like to play with sentences as I write. I usually do something called cycling, where I write a chunk, go back and edit, polish then move on. That's not possible with writing sprints. To maintain high speeds, you have to ignore grammatical errors and spelling mistakes and simply push on. And if you want to hit the magic 5000 words per hour goal, you need to switch to dictation. I've tried that with Google Docs, both in the house and while out walking the dog. With my accent the results were usually hilarious and needed more work than ever just to get them to make sense.
All in all, I really like the fun and the challenge element of writing sprints, so I'm going to keep with them for now, and plan to really go for it when I start my next project. I'm going to plan in advance and see just how fast I can complete a 30k Middle Grade novel. I'd like to get a first draft in ten days.
But for now, I'm going to keep the sprints for fun projects that aren't really about anything. Just writing for the sheer fun of it.