But it sounds so dull like that! Go higher gradually. Yeah, U2
do some songs lower but they also render it differently. And those
who want to audition for Idol can take advantage. 
and i do notice some songs dropping key when the chorus
starts (to suit the singer's voice range) and upping the key again
when the chorus ends lol. Sounds terribly weird but unique

I haven't heard anything like that though.