In article 
, 
usenet@bondegezou.demon.co.uk (Henry Potts) wrote:

> what evidence shows that
> AV is *generally* less proportional to a significant degree?

It's the consistent record in Australia AIUI. There is also some evidence 
from second preference data that Labour's majorities in the UK in 1997, 
2001 & 2005 would have been larger under AV. I would suggest that 
unpopular parties will generally lose more heavily under AV than under 
FPTP. So, an AV election now would lead to a heavier Labour defeat than 
under FPTP, just as it would have led to heavier Conservative defeats in 
1997-2005.

-- 
Cllr. Colin Rosenstiel
Cambridge                    http://www.rosenstiel.co.uk/
Cambridge Liberal Democrats: http://www.cambridgelibdems.org.uk/