Lip Syncing, Overdubbing, and all that crap is nothing new and Journey isn't the first, nor will they be the last if it's indeed true that they are doing so. I have many concerts, by many bands and I can definately tell the difference between the singer is singing and when he's talking to the crowd. There's always a sound difference. One of the biggest i've ever noticed was Ozzy Osbourne, especially on the Speak Of The Devil DVD with Brad Gilles on guitar from 1982-83. He sings so clearly, even while running, but when he talks, he's out of breath.

You can find these on evilbay from time to time.