Hm, we were planning to go to LA this year, but with a German passport in light of this article, Uhm, I'm having second thoughts. I wasn't that worried about problems when we went to China last year.
People play live faster because of the adrenalin, you'so excited to play they you automatically play faster.
This is HAW we came up with the tempo in the bands I played in.
Someone comes up with a riff or a lick and it already has a tempo in their hand which sounds good. The rest of the band builds the rest of the song around this part with the same speed.
Sometimes we go down to half speed for some part just for the effect. Sometimes we make the song faster at the end for the effect to make it more brutal.
There are occasions that someone in the band feels that the song is too fast or too slow after we already wrote it. In this case we try the new tempo, if everyone is feeling it's better we switch to that new tempi.
Lemmy mostly