With regard to the alleged undercutting of opponents by the timing of announcements:
If the Topp people really are timing their anouncements to undercut opposing candidates' launches, it seems to have been a prety abject failure in relation to the Dewar launch. Yes, Topp did get some press, but Dewar's launch was the dominant story of the news cycle. Even in Saskatchewan - where Shirley Douglas was born and raised and where her father is still a political icon - the Dewar story dominated.
So, how do we explain that the Douglas story largely failed to undercut Dewar (if that was its purpose) while the Davies announcement appears to have been more effective against Cullen (again, assuming that really was the point.
As I skate along Occam's razor, I offer a different possibility.
Cullen's announcemebnt was in Vancouver, which most of the Parliamentary Press Gallery would be challenged to find on a map, while the Davies presser happened at their doorstep on Parliament Hill.
By contrast, the Dewar announcement was in Ottawa, which the Gallery believe is the centre of the universe, while the Douglas endorsement was a news release about a past event in Toronto with no photo op.
So maybe, just maybe, the nefarious timing has very little to do with Brian Topp and a great deal to do with how the nation's political coverage operates.
Please note, I'm not "blaming" the media. I don't think anyone was really hurt by the way either of these played out. I'm merely suggesting that the way this played out was entirely predictable to anyone with even a vague clue of how the national political media works, and that the assorted accusations upthread are not worth the bandwidth they are broadcast over.