SEO: Separate IP Address for Each Country-Specific Site

Should I use a separate IP address for each country-specific site? Today, Matt Cutts answered this question in another webmaster video. He said ideally it would be great to have different IPs on different locations for their respective locations or countries. But it seems that SEOs and Webmasters shouldn't worry about this too much as Google is smart enough to take TLDs (top level domains) as a strong indicator that your site is operating normally.

Click here to see the video in Google Webmaster YouTube Channel.