I agree with their assessment that the rollout rate for W10 within the first 2 years will be slightly better than it was for W7. Unlike the W7 upgrade, this one doesn't seem to require any hardware upgrades, and application compatibility so far seems very good. All the indications are that an upgrade from W7 to W10 should be much smoother than the jump from XP to W7. Add to that the free upgrade in the first year, and an increasing confidence the direction Microsoft's development has take under Sataya Natella.
Granted, we don't know what their methodology is that produced the figure of 60% within the first 2 years for W7, but as long as the same methodology is followed to measure the W10 penetration rate I think that 75% prediction might not be too far off the mark.
I don’t agree or disagree with your assessment, but my question would be (going back to my earlier email):
Is that penetration rate 75% of all business PC’s being used, or 75% of all registered businesses say they are using Windows of a given version?
Because if it is 75% of all business PC units deployed on desktops, that would be simply astonishing.
If it is 75% of all registered businesses have deployed ...that could mean quite a different thing!