Looking at the improvements made by the different teams from 2014 -> 2015, Ferrari improved more than any other team in qualifying. If we give Ferrari the same bigger leap of development, but keep a similar rate of development for Mercedes for this year, and throw in an overall delta of around -0.6s pace improvement for the ultra soft tyres over last year's super soft, here are my rough estimates for a dry qualifying:
Mercedes: 1:13.3 to 1:13.5
Ferrari: 1:13.5 to 1:13.7
Williams: 1:14.0 to 1:14.3
Red Bull: 1:14.0 to 1:14.3
Force India: 1:14.2 to 1:14.5
McLaren: 1:14.3 to 1:14.6
Torro Rosso: 1:14.5 to 1:14.8
Too lazy to work out for Renault, Sauber, Manor etc. I was being a bit generous to Red Bull and McLaren, as they actually got slower versus themselves from 2014 -> 2015, so I allowed them to close that gap,
and have the same rate of improvement as Ferrari. Was being very generous to TR and also, this doesn't take in to account the recent trend of Ferrari dropping pace when Q3 comes.
I know I said a 1:13.6 for McLaren in the team thread, but that's using their average improvement across all tracks for this year. The above estimates are derived from Canada specific improvements from team to team.
It may be close between McLaren and Force India again for Q3 spots, but not knowing where Haas will figure, it may not be very close in the end.
As ever, I'll revisit after qualifying to see if I'm right!