I think Labour has underestimated factor 3 on Saint's list badly. Also Ian Gray is a non-entity compared to Alex Salmond and I think people are genuinely looking at the options and far more are concluding that in difficult times, they see Alex Salmond as First Minister material and not Ian Gray.
The other factor is a growing disconnect between Westminster and Scottish Parliament elections. I think Labour had unrealistically high expectations based on last May and Opinion Polls earlier in the year may have reflected the fact that people weren't as focused on the Scottish Parliament as they will be with the election looming - possibly giving Labour higher ratings at that time?
Also where is the Labour campaign? Anyone seen Ian Gray recently? Locally a number of popular Lib Dem incumbents have stood down - making it much easier for the SNP to make headway in these seats - the Highland mainland seats are reportedly too close to call between the SNP and the Lib Dems.
Putting that Times poll into the ScotlandVotes.com website saw the country turn a sea of yellow, it projects the SNP to win 66 Seats.
Could the SNP and Alex Salmond be on course for majority government? Perhaps one of the ironies is that being a minority government having to work construcitvely in Parliament for the past 4 years has benefitied the SNP this time round - in that providing stable minority government requires you don't piss too many folk off?