Only if it's true, which again, it may not be.
I'm not sure if you realize that Einstein's theories are supported by years and years of measurements and research. It holds up to a lot of scrutiny. Just because someone measured the speed of a particle more accurately than previously, and that speed might be faster, doesn't mean it is faster or that Einstein was completely off. If and only if other scientists are able to repeat the results in different circumstances, with different equipment, to the same level of accuracy, then it's time to re-evaluate Einstein's theories, not throw them out the window.
A scientific theory is never an indomitable fortress, but it takes more than a breeze to sway it.