Pure American thrash describes Testament in every way. Since 1987 these guys have NEVER strayed from the true sound. If anything they got heavier as the years went by. Listen to their albums from the past 10 years and you would be amazed at how true to the thrash sound they have remained. Chuck Billy can sing and does death growls. The guitar work has always been superb. And in recent years with Dave Lombardo or Gene Hoglan on drums, the percussion has been massive.
Those of us in the metal community have always given them the recognition they deserve and continue to do so. Souls of Black was when I first heard them, and that was my hook. Wish thrash legend Chuck a happy birthday!
Hail and Horns