In a first ever, Keynote® (NASDAQ: KEYN), the global leader in Internet and mobile cloud testing and monitoring, is closely measuring the speed and reliability of Super Bowl advertiser’s websites both before and after the big game on Sunday across three screens: desktop, mobile and tablet. How will the sites fare, is the big question.

While Super Bowl advertisers pay millions to get their television ads in front of over 100 million people in the U.S. alone, are they prepared to actually handle the onslaught of site traffic they hope to generate?

This year, for the first time ever, and because of the growing importance of the mobile channel to business, Keynote is measuring the performance of Super Bowl advertiser’s websites in real time across three screens -- desktop, mobile and tablet -- to see who crosses the finish line first during the most watched television event of the year. The creative is ready. Social media campaigns are already teasing viewers. Come Super Bowl Sunday how will advertisers fare when viewers start clicking on the company’s sites?

Keynote experts will be on hand Monday to share metrics and explain the performance of the real winners and losers of this year’s Super Bowl; the advertisers. If you would like to take a closer look at how the big name advertisers perform and/or to receive future Keynote reports on major Web events, please email Ann O’Leary at ann.oleary@keynote.com or Dan Berkowitz at dberkowitz@keynote.com.

About Keynote

Keynote (NASDAQ:KEYN) is the global leader in Internet and mobile cloud testing & monitoring. Keynote maintains the world’s largest on-demand performance monitoring and testing infrastructure for Web and mobile sites comprised of over 7,000 measurement computers and mobile devices in over 275 locations around the world that enable companies to continuously improve the online and mobile experience. Known as ‘The Mobile and Internet Performance Authority™,’ Keynote offers three market-leading product platforms:

Keynote Perspective® provides on-demand performance monitoring for enterprise web and mobile sites including online portals, e-commerce sites and B2B sites. Over 2,000 customers rely on Keynote Perspective services to know precisely how their websites, content, and applications perform on actual browsers, networks, and mobile devices.

Keynote DeviceAnywhere® provides the industry's only true cloud-based platform for testing and monitoring the functionality, usability, performance and availability of mobile applications and websites. Its suite of mobile testing solutions is used by over 1,000 mobile developers and enterprises to deliver quality mobile applications and services to the mobile channel.

Keynote SIGOS® offers active end-to-end Quality of Service (QoS) testing and monitoring solutions for mobile, fixed and VoIP communications. Its SITE and Global Roamer products are used by over 200 network operators, content providers, carriers and regulators in over 100 countries worldwide.

Keynote's 4,000 customers represent top Internet and mobile companies and include American Express, AT&T, Disney, eBay, E*TRADE, Expedia, Google, Microsoft, Sony Ericsson, T-Mobile and Vodafone. Keynote Systems, Inc. is headquartered in San Mateo, California and can be reached at http://www.keynote.com/ or by phone in the U.S. at 1-800-KEYNOTE.

The trademarks or registered trademarks of Keynote Systems, Inc. in the United States and other countries include Keynote^®, DataPulse^®, Keynote Customer Experience Rankings^®, Perspective^®, Keynote Red Alert^®, Keynote WebEffective^®, The Internet Performance Authority^®, MyKeynote^®, SIGOS^®, SITE^®, keynote^® The Mobile & Internet Performance Authority™, Keynote FlexUse^®, Keynote DeviceAnywhere^®, Keynote DeviceAnywhere Test Center^®, Keynote DemoAnywhere^® and Keynote MonitorAnywhere^®. All related trademarks, trade names, logos, characters, design and trade dress are trademarks or registered trademarks of Keynote Systems, Inc. in the United States and other countries and may not be used without written permission. All other trademarks are the property of their respective owners.