The journalists who wrote this should be decapitated. The premise of their paper is more or less wrong, and as usual they misunderstood what the physicists were saying.
W-W scattering provides a unitarity bound on the mass of the Higgs boson, which most people expect to see at CERN. If its not there, it would not be the end of string theory (a theory of quantum gravity that is some 20 orders of magnitude different scale), but it would be somewhat perplexing for the standard model of particle physics and something a little more contrived would be required.
Otoh a detection of the Higgs boson would have absolutely nothing to say about the veracity of string theory.
There are toy model proposals (amongst tens of thousands) whereby you could get stringy effects at such low energy scales (eg large extra dimension models and so forth) so the detection of that would be spectacular, but nondetection just means its either not at the energy scales probed by CERN or just wrong. But the point is, thats just *one* model, there are many of them inspired by string theory. Part of the whole problem with the theory is that it doesn't specify uniquely the physics of the observable universe at accessible energies.
@ the thread title.