If you read the press release (second link in the article), Razer states that other mechanical keyboards aren't necessarily designed for gaming, they're just standard mechanical keyboards "rebadged" as gaming keyboards. Anyway, let's not argue semantics guys.
Razer said:Most mechanical keyboards in the market today are standard mechanical keyboards rebadged as gaming keyboards that feature stiff keys that cause key actuation fatigue. Such keyboards are inherently worse off for gamers as it actually decreases gameplay performance as opposed to enhancing it. As a result, most professional gamers eschew such marketing gimmicks for regular membrane keyboards.