It's not true. I mean the rumor that is on the spread, that Sony has copied Nintendo's Wii remote mechanism and has implemented their motion sensing technology into its PS3 controller, is not true. Sony Worldwide Studio president Phil Harrison in a recently held interview has revealed that they have actually started discussing the idea more than a decade ago. On absolute terms, since 1994.
But why then they didn't develop it before anybody else? Harrison said that then technology was not sufficient enough and also it would have been impossible to price it low. He also has stated that they had to wait for some convergence to happen to launch this controller.
Conclusion
Nintendo received positive response after launching Wii remote.
Sony received negative response after Boomerang controller launch.