Ouch. hi5 folks let me know if I can help you find your next gig.
I think the real reason they're able to get by with less hardware is because they now have a ton less traffic and the new site runs on newer hardware.
I also note that it appears that they're still running on tomcat + netscalers for now:
curl -v http://www.hi5.com/friend/displayHomePage.do 2>&1|egrep 'Server:|NSC'
< Server: Apache-Coyote/1.1
< Set-Cookie: NSC_bqq-tfswfst-ofxvj=e246bb343660;expires=Tue, 20-Sep-11 10:20:46 GMT;path=/