Hi Jen
We are in the fortunate/crazy situation where we have a custom CMS so the actual redirects are not really a problem from a technical standpoint, it is just wondering if we should
The main site - the biggest and busiest - has a discussion board and a shop, and a blog which the others don't so the articles are about 10% of the indexed content, and about 11% are unique.. the other 2 sites, one has 0.003% unique articles and the other 1.829% ... sounds pretty bad when I put it like that!
We haven't seen a noticeable dip, just general disappointing performance, I think I will try and rope someone into doing a full CSI on the data 
Have you seen anywhere that has recovered from a comparable situation? The pondering at this end was that the damage was already done, and that was that.
thanks 