Few comments about traditional news aggregators including Google News:
 
1- They almost all have their own RSS feeds which means the updates are normally available to RSSMicro.
2- The timing is based on the indexing not the publishing time, there is sometime a big latency between the time article has been published and indexed.
3- They are traditionally limited to few thousands of news sources, they do not count in the content from social medias.
4- Since the competition is high and the technology is limited they tend to compete on UI or other services irrelevant to real-time data indexing and delivery which makes other services like Twitter very popular.
 
On another note: wondering why some websites are well treated by Google for maximum exposure:
 
http://www.google.com/search?hl=en&source=hp&q=site%3Adaylife.com&aq=f&oq=&aqi=
 
Wondering why Google indexes so many pages on DayLife while it is not an original content site? is Google biased?