You may "highly doubt" it, but read the actual privacy statement:
"When you acquire, install and use the Program, Microsoft collects information about you, your devices, applications and networks, and your use of those devices, applications and networks. Examples of data we collect include your name, email address, preferences and interests; browsing, search and file history; phone call and SMS data; device configuration and sensor data; and application usage,"
Specifically, Microsoft may collect "voice information" when people use "speech-to-text" features, file information about files that users open, and "typed characters," meaning text that users compose.
There is no differentiating between what "typed characters" are.
Don't get me wrong. I understand the desire to collect most of this data DURING THE TESTING PHASE, but Microsoft is being really quiet on their plans for the final release version:
"When we release the new version of Windows, we will have a privacy statement that reflects the final product, and will share more as development continues," a spokeswoman from Microsoft said via email when asked for comment. (Source)
I really don't understand how or why MS would try to keep this Privacy policy intact for the final release, but if they do, a lot of people, myself included, will likely jump ship for a different O/S.
Only time will tell. Until then, I run the Tech release on a non-production box that won't have anything "important" entered on it. Of course, MS won't get the proper feedback they are looking for from me (and hopefully most others), but that's just the
way it works.