I remember the question having a net -2 score early on as well. The initial question was in broken english, which I suspect added to the early poor reception. I knew the question had potential and was worried it was quickly going to get buried, so I edited the question for english grammar as quick as I could [14:58] and started working on my answer.
It took me a bit to get my initial results, and I had other things going on, so by the time I was ready to post [18:30], Floris had already answered with his first dimensional analysis results [15:05], so I amended my answer a bit in light of his answer and posted it.
From there, Floris and I kept commenting and editing our own posts based on the updates of the other's. I really think the reason we ended up with such a great pair of answers was because we both kept working off each other's improvements.
I think there are a few lessons to draw from the question. The first is that people should try not to judge questions negatively based solely on english grammar, it is easy enough to edit a question if you think it still has potential. The second is that answers can feed off one another and lead to mutual improvement.
In addition, I'll mention that I was afraid the question was going to get closed. I know it wasn't in this case but I was afraid of it nonetheless. One because it was in broken english and I think we can agree that as a whole the site isn't the most friendly towards non native english speakers, and second the question was broad, and I feel the site is a little harsh on broad questions.
JustI realize I've only been a member for a little while. I've been lurking for quite a while and only recently decided to pull the trigger and start contributing. Just my observations and food for thought.