@Darkwatch - have found that in general, they do seem to be more up-tempo than Metallica, whose music isn't all that fast, whereas the double kick bass pedal seems to be a prominent feature of Nevermore.
And I could have played them a track I guess, I think I had my MP3 player on me at that point.
And their myspace claims that they are metal with elements of thrash and prog in there.
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Iced Earth - Desert Rain