I definitely don't say "aboot", and to be perfectly honest, I've never in my life heard anyone say that (I'm born and bred Canadian, and lived here since forever), except on TV when they try to make fun of Canadians. I think it must be something that is said in one specific region. It has been my life's mission to squash that rumour. I'm guilty of saying "Toronno" though. It's just easier.
I do say 'camp', instead of 'cottage'. It's a Northern Ontario thing. In the Muskoka region, everyone has a cottage. Up here, everyone has a camp. It's the exact same thing, just different term. I believe in BC they say something different again, like 'cabin'.
I'm leaving in two weeks for the UK - I'm really starting to get excited. I'm moving to Newcastle though, and EVERYONE on the planet has warned me about their "unique" accent. I figure I'll give myself a month to sort out what's really being said.