No. I didn't have to recalibrate Kinect after the inital set-up. I played Kinect for approximately thirty hours in total, during the day with sunlight streaming behind Kinect through my bay window, at dusk, in very dim conditions without artificial light, and at night-time with nothing but artificial light.
Kinect never once failed to recognise the players, and never once stuttered as a consequence of poor lighting conditions. The reviewer did not, however, keep changing his clothes or the colour of his sofa, so he concedes to the possibility that more thorough testing might have highlighted minor issues.
What I won't concede to, however, is that the technology isn't impressive, even allowing for minor flaws that he personally didn't experience.
I am no fanbois, and I'm certainly not in the paid employ of Microsoft. I'm just a dedicated gamer and technology enthusiast.
If Clive Sinclair had made Kinect, I would still be singing its praises. It's not perfect, and the initial launch titles do little to dispel doubts over motion-controlled gaming in general, but it is the best mass-market motion-controlled gaming device available. And it is fun, even for a die-hard hardcore gamer like myself.