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Not I find the new page shows up briefly in a good position just like I would expect, but then it disappears for a while. Finally it gradually gets back in the serps and very slowly crawls up.
It's not for as long as the sandbox experience a lot of sites get but I wonder if there is any relationship between the two.
What happens is the bots crawl the article site see the new articles and boost them briefly due to the link value... but due to webmasters abusing links.. a dampening filter is then applied by the other bot to pull new content back down.
If the news is immediately relevant IE Hurricane Katrina the filter does not apply from what I have found. This is due to the amount of inbound links and press the the incident receives.
While your posting an article is new fresh and relevant in the grand scheme of things to search engines..... it isn't......
(No offense meant)
If I look at the SERP's, I DO see positioning that suggests "real PR" exists for the page but positioning seems even more affected by dc switches than older pages (I see a search result in my logs but can't duplicate it, next day the positioning is back, then goes, then returns).
I think its all part of the switch to BD and will likely return to normal when (if?) things settle down across all dc's.
Guess the question will be if the BD algo will still apply the "freshness advantage" or if it will be dropped. Seems unlikely they would, as it does generate better results.