I always wish these surveys would break apart cultural Catholics and practicing Catholics.
Agreed. This works on two levels:
1) Catholics don't completely apostatize like Protestants tend to, so you get a lot more irreligious in all but name type identifying with the Catholic church.
2) People who specifically identify as "Lutheran Church-Missouri Synod" or something specific like that are probably going to be more religious, knowledgeable etc, than a generic "Catholic". The specific denomination name serves as a way of splitting out more religious people in a way you can't really do with Catholicism.
It would be interesting to see various Protestant denominations in Canada, the UK, Australia.
Taking some wild guesses...
CanadaTories got something like 55% of Protestants in 2011, so I would guess that even the United Church has a bit of a Tory lean and that Evangelicals vote something like 75-80% Tory. Some possible exceptions would be the Salvation Army (mostly in Newfoundland), and maybe Pentecostals.
UKC of E - Tory
Evangelicals - Bit of a mixed bag (White Troy socons mixed with Labour voting minorities)
Non Anglican/Evangelical Protestants - Lean Lib Dem, although this link might be severed now.
AustraliaNo idea