Some antivirus vendors will not flag a legitimate company distributing questionable and misleading applications.
Other anti-malware are good though, they will mark it adware or potentially unwanted programs.
You can determine which Antivirus scanner will detect by sending the setup file at VirusTotal online scan service.

http://hosts-file.net/default.asp?s=doublemyspeed.com <-- red
http://www.siteadvisor.com/sites/doublemyspeed.com <-- green Sad
http://www.mywot.com/en/scorecard/doublemyspeed.com <-- red

http://www.mywot.com/en/scorecard/registry-cleaner.net <-- yellow
http://www.siteadvisor.com/sites/registry-cleaner.net <--- green Sad
http://hosts-file.net/default.asp?s=registry-cleaner.net <--- green Sad

As to CNET logo on doublemyspeed.com, it is using CNET rating thingy and not the approved by CNET.
I don't think they should use that logo if their product is not reviewed by CNET or not in the download.com website.
CyberDefender, the maker of doublemyspeed.com only have two products in download.com:
http://download.cnet.com/windows/cyberdefender/3260-20_4-6280328.html
CyberDefender Early Detection Center
CyberDefender Registry Cleaner

Thanks for your report!