I think Nevermore would headline over Turisas .. especially in the US. Still though .. Turisas has a real strong internet following, and I bet if they were announced for a US fest folks would show up. I've been studying myspace profile hits of late, and some of the findings were interesting. I did a random selection of bands some huge, some with decent drawing potential, and some of the smaller bands. Here's what I found.
I've added the date that the page was created. Time obviously has an effect on the number of hits, but outisde of a ba d or two I don't think it's a huge factor in regards to this list.
Nightwish (11/21/06) 4,591,508
Lacuna Coil (3/28/05) 3,143,710
Megadeth (3/1/06) 2,260,311
Iron Maiden (4/26/006) 2,167,228
Dream Theater (2/20/07) 1,558,958
Amon Amarth (12/24/04) 772,978
Queensryche (11/15/05) 584,130
Kamelot (3/23/06) 486,785
Nile (5/26/05) 470,882
Blind Guardian (11/28/04) 412,639
Sonata Arctica (9/19/05) 401,698
Kataklysm (1/21/05) 382,740
Nevermore (6/28/05) 377,441
Symphony X (2/9/06) 326,722
Firewind (5/15/06) 229,870
Moonspell (7/14/05) 220,285
Amorphis (5/26/05) 190,526
Satyricon (3/8/06) 187,678
Iced Earth (6/4/07) 163,156
Turisas (2/20/06) 160,477
Volbeat (2/21/06) 151,872
Stratovarius 9/27/06) 145,115
Riverside (6/28/06) 109,409
Trouble (6/11/05) 107,001
Elvenking (5/1/05) 83,481
Candlemass (1/4/06) 75,257
Nocturnal Rites (10/19/05) 72,742
Novembers Doom (12/21/04) 71,861
Pagan's Mind (4/28/06) 71,031
Primordial (4/6/06) 70,877
Threshold (5/16/06) 60,949
Angra (9/8/06) 49,332
Mystic Prophecy (5/3/05) 28,755
Vanden Plas (3/15/06) 23,193
Wolverine (7/29/05) 21,496
Brainstorm (9/4/05) 21,492
It's not the most scientific thing in the world, but it does give some indictation into internet popularity, or perhaps that some bands have younger/more interenet saavy fans than others.
Britt