I don't believe in it. Here's a guy with Ibanez, and it's trem (some sort of Edge, I believe) flutters insanely good. And here's tracking session of the original song, played with EBMM. Lee's not playing that particular part with flutters, but you can hear it on playback, and I believe there was no editing done yet (considering it's only tracking). And again, it flutters great.