Who'd be a soprano?

First Gary tells them they they are making a really good sound - they just need a little more confidence, need to be a little more in tune and could do with a few more people... Then Joe tells them that they've got a good vibrato, but that normally a vibrato starts on the note and goes up, whereas theirs starts on the note and goes down. Oh, and if they can't reach top G then they should be singing alto. Does that mean we altos who sometimes struggle to reach E get to join the tenors?
Maybe we should transpose all the pieces we're singing down a third.
I thought yesterday's rehearsal went very well though, and the Kyrie at the start of the Nelson Mass is sounding fantastic after Joe's work on the phrasing.
Ros