netmeg - 12:31 pm on Jun 13, 2012 (gmt 0)
Maybe there's some kind of content profile to it as well? Obviously they are trying to get news results faster. I have event sites, and new events get indexed very fast, within minutes. Those are probably profiled by Google as being date/time sensitive.
But on my personal site, it can be a few hours to a day or two (same with client's ecommerce sites when I make a change or add a product)