Fair play to Adam for doing what he does. There's an audience out there for him and Brian and Roger seem to love him.
However, I'd gladly take Fred on his worst day than Adam on his best day. The way Freddie delivered the songs, his charisma etc. he was everything a frontman should be.
Queen songs deserve to be played live and I'm beyond delighted Brian and Roger have found someone that they feel do justice to the songs.
I've seen them once with Adam and once with Rodgers. That's enough for me, I'm more than happy going back over the albums/live recordings.
I don't think Lambert will be topping any best rock singer polls anytime soon.
Nor do I think any there'll be any scientific studies on his voice.