i won't go over what's been said, other than to point out that the ndp never previously polled as high as 10%. if the bloc are polling at 10% or higher, the ndp would have to be swinging a considerable number of liberal voters to even be competitive.
that said, i'd like to see some polls in outremont - which is one of the first ridings you'd expect to see swing back to the liberals, if they're getting a boost over 2008, which they clearly are. i suspect this is a deflection.
www.huffingtonpost.ca/2015/09/18/justin-trudeau-papineau-anne-legace-dowson-poll_n_8161098.html