Google Chrome Security Updates

I see over on US Cert that Google Chrome has issues a security update for the third time in the past 30 days.  US CERT isn’t particularly timely with its posts but you they do link to the original blog posts at Google where you can get the dates.
Google Releases Chrome 5.0.375.99 
Google Releases Chrome 5.0.375.86
Google Releases Chrome 5.0.375.70

It seems like these security updates don’t get the press that other security updates get.   Is Chrome used that little?

Is it a good thing that Google is using its silent updates to update security issues frequently rather than having to wait for a monthly patch dump?   I imagine most people dont even know their browser was updated.   I see it has updated because Secunia PSI complains about the old version that Google’s update doesn’t delete.