EDIT: Also, your conclusion:
"Over time, these autocomplete suggetions will change, but for now it’s clear that a lot of people using Windows 8 don’t know how to do the tasks they are familiar with in Windows 7."
Why are you assuming that they're Windows 7 users who are now unable to do tasks after an upgrade? What if the Windows 8 users are people who are new to Windows?
EDIT: I guess I'm not considering people who are just buying their first computer, and that that computer is a windows 8 machine......I would be really curious to see the numbers for OS breakdowns for "first time computer buyers", and how many of these were people who genuinely never had their own vs. adults who previously used machines owned by their parents.....I'd imagine this number is also pretty small these days....