Your grandparents disliked Elvis because of the type of music he sang and his body movements when he sang them, not because he was not talented. I'm pretty sure if he would have started out with one of his religious albums they would have had no issues becuase he had a great voice and kept it under control.
Adam Lambert has a great voice. He just doesn't have it under control consistantly and during EVERY song he ends up screeching at some point. While you might not have the ability to recognize that, it's true. Maybe next time you could apply a little comprehension to the words you read before shooting your mouth off.
Shoot my mouth off? What the heck are you talking about? I think you're hearing things, including Adam's so-called "screeching."
Oh, and by the way, Mr. Comprehension master - unless you knew my grandparents, perhaps *you* might reread what I posted - and what it was about Elvis that they disliked.