Brandon Boyd is such an amazing singer. When you are at an Incubus concert, he sounds exactly as he does on their CDs. That's the test of a truly gifted singer.
Can be. I never liked Red Hot Chili Peppers because their lead Anthony Kiedis didn't seem to be able to do it. But Mike Patton of Faith No More and others prides himself in giving a different performance every time, and he's respected for his range.