Just fished out the link there:
http://www.techcrunch.com/2009/05/05/twitter-mania-google-go...
Re:Apple in talks to buy Twitter for $700m
by gabrielroth on Tuesday May 05, 2009 @07:25PM
(#594882)
The British press is well-known for overhyping stories in this way.
This is very partial reporting. The TechCrunch article went out of its way to point out that the rumours didn't check out with other sources.
So, effectively, despite the otherwise reputable source, it seems to me that this article is just echoing the same rumour around without adding anything to the discussion...