I was worried this wouldn't work very well for them, because Google always wants to put "relevant" stuff first and "most recent" (the way Twitter does it) later. So from that point of view, they could never match Twitter for latest news. But putting the latest news on top of the relevant ones is a pretty smart way to do it, rather than just relegating it to another tab.
Also, danmaz74 has a point. If you search for #Android, you should see only posts containing the hashtag "#Android" and then sort them out by relevancy, and so on. But 100% of the posts should have the hashtag in them if that's what the user was searching for. For non-hashtag queries they can use their regular relevancy algorithms.
And most recent is always so terribly relevant in Twitter feeds ....
I'd like to see some sort of ranked system. Google does really good for relevance, but timeliness also matters. Some sort of score where a relevant / trusted but not quite-so-recent post gets promoted on top of spambots would actually be a Good Thing[tm].
Also, danmaz74 has a point. If you search for #Android, you should see only posts containing the hashtag "#Android" and then sort them out by relevancy, and so on. But 100% of the posts should have the hashtag in them if that's what the user was searching for. For non-hashtag queries they can use their regular relevancy algorithms.