Agree that it's sad nad worrying that so many people don't seem to care/know. It always seems the way in politics. But given how little most people do care about these things generally, it seems a bit odd to say :
'but only 37% supporting AV is quite a small number considering they've had it for 90 years so are more informed of it's limits and it's faults so their perception of it is based on seeing it in practice not just in theory'
Apart from the fact that this in one poll, to assume that all these people have studied the issues carefully based on 90 years of experience is a bit much really.
Also this:
The fact also remains in Australia - they have AV BUT where giving a second choice is optional not compulsory only 30% bother to give a second choice vote. In effect therefore Australians vote as if they have FPTP not AV whenever they can'
So this 30% means something but the other 37% mentioned doesn't 