Definitely. I've run accross this on many occasions, and the situation with Inktomi was cleaned up almost immediately.
From what I understand, most don't, which is why they give you the run-around. However, that doesn't mean that ALL don't ;)
I just think that trusted feed is the way to go. You know immediately when your site has been penalized, and once you contact the right people, you can get it resolved in a very short amount of time. I just think it's wiser for ROI purposes as well, which tells you when you need to either optimize or de-optimize a specific URL, etc.
[edited by: panic at 9:36 pm (utc) on Dec. 9, 2003]