I don't know if there is any footage of this, but when I saw Dream Theater on the 18th of February in London, first show of The Astonishing tour, James completely messed up the timing on The Walking Shadow. He said "As his weapon finds its victim, mortified, he's shocked to find the shadow is Faythe" waaaaay too early, long before the visuals actually showed Faythe being killed.
Oh, that's a shame. It's my favourite section of the album, and he sang it perfectly when I saw them last month in Luna Park. In fact, it was John of whom I remember a few mistakes (at the beginning of "Dystopian Overture" and at the middle of "Heaven's Cove").
What I do remember about James is that some of the Arhys/Gabriel vocals sounded as if Faythe was singing, although maybe it had to do with the sound on the venue. Anyone had a similar experience?