Under normal circumstances I would agree. I had my reasons for changing the content on the page, and in the interim it was reduced to just 5k as I stated. The temporary content reduction gave me an opportunity to see what would happen, since I had already been observing small pages outranking longer documents. During the 2 to 3 day period when the homepage content on two of my sites was being changed, MSN responded the same way to both. The content, though changed/rewritten, has since been added back to my pages, so I expect to see a resulting drop in MSN rankings on the next crawl.
The experiement really happened because of other circumstances, but it was still interesting to see. As has been expressed above, it is not recommended that you make sweeping changes JUST to please MSN. MSN simply doesn't drive enough traffic to justify the loss of indexing on longtail phrases at Google.