COSLA president Keith Geddes said the results 'nail the false impressions that Scottish local government is resistant to change'.
But government proposals for the introduction of directly elected provosts found virtually no favour. Only City of Glasgow leader Frank McAveety spoke out in favour.
On PR, 23 of the 32 leaders favoured a proportional voting system, providing it retained a direct link between councillors and their constituents.
'The results confirm and reinforce COSLA's radical submission to the McIntosh commission in which we argued councils should have the freedom to choose the forms of political decision making appropriate to their communities,' Mr Geddes said.