Jesus Christ, this is not even close to being true and a paltry 5 minutes of research could have confirmed it. Starting from: http://techcrunch.com/page/311/, looking at stories from September 29th, we have:
SocialBakers: Still around
SweetLabs: Still around
Networked Insights: Still around
Hipmunk: Still around
Fameron: Still around
Vostu: Still around
Storydesk: Still around
Shazam: Still around
Kred: Still around
TechCompanyPay: Still around
GetComparisons: Still around
In short, this article isn't just wrong, it's dangerously wrong. 100% of the startups in this sample still exist.