@ Gorguts guitarists being that skilled. There are loads of virtuoso guitarists that would run circles around them.
tbh shredding really fast isn't the best demonstration of skill, since it's purely a finger exercise; the right hand is just picking really fast and steadily, which is really really easy. Complex riffs in odd times with weird rhythms are way harder than mindless sweeping. That said I haven't actually heard Obscura. I heard one song off it, though, and I rather suspect you're flat out wrong. They may not be the best, but they clearly know their way around the fretboard.