Actually, as a member of the NGO-government committee on refugee sponsorship, I have quite a good overview of several sponsors who submitted their applications to Ottawa, to the case review of CIC. They send the files from the visa post, and finally the case management here does the case review. Unfortunately, more than 99% of files are negative, which means they don't even go into detail to assess the cases. They don't even teach us by saying what the reason is for rejection. There is generally no positive outcome at all. It's really unfortunate that this is the only remedy or way we have, but it doesn't work.
On February 1st, 2007. See this statement in context.