Who are you most likely to invite to have a burger with you?
In Quebec, more people want to have a hamburger with Harper than Dion.
These numbers are similar to the leadership numbers, in that Layton scores quite well, relative to party support. Harper is right about where he should be, while May is certainly drawing some curiousity with Canadians. Dion, not exactly impressive.
Useless? I think there is something within this numbers that is relevant. Clearly, Dion's image isn't one that Canadians have embraced, on a personal level. Issues aside, the ability to connect with people is paramount to prospects, so I wouldn't reject this type of poll out of hand.