I too was skeptical about free writing at first but as a result of applying the free writing technique taught here at the challenge I am a better writer, at least I think so, but time will tell. (Has nothing to do with how I am writing now though)
I am able to write about topics in the IM niche even without fueling since I joined the challenge. I guess I should not say that I have not fueled before writing because listing to the videos and reading the content here in the challenge would be considered fueling up.
Sometimes in about 5 to 10 minutes I find my self writing at least 300- 500 words within that period. Leaving the article overnight as Ed teaches really works. No writer as Ed says in the lessons write and edits the same time.