My first thought was to laugh myself silly with a touch of indignant rage.
But actually I take this a bit more seriously.. There is a well known phenomenon (that I am sure somebody else knows the name of) where people tend to believe what they read and we are not the target audience of this advertising tripe. Many people who will read this (and do not know better) will believe it and follow it and pass it on. And that irritates mes.
In this fraternity we all sit back and mock the ridiculous claims and statement in their FUD and sales - but at the end of the day they are quietly winning the war with one ill educated person swayed towards their cause after another.
I sure have no answers, but I do not feel like mocking this kind of crap anymore.
At work I use FF - but I am forced to use IE for the corporate portal because apparently only IE can possibly work on the portal, so they paid somebody to edit the script to reject all "non-approved" browsers. That is the end result of ill informed high up decisions based on fluff like this.