This from Microsoft:We must stress that the feedback being collected in the Windows Technical Preview will only occur within the Technical Preview period. Once Windows 10 launches to the public as RTM, the data Microsoft collects will be removed from the operating system.
This isn't a permanent feature within Windows 10, and therefore should not be a concern to your average Joe.
Its now called Connected User Experience
Link to disable this at bottom of page!
You can disable it using the Services manager.
Windows-key, type services and hit enter
Locate the service Diagnostics Tracking Service and double-click on it
Activate the startup type menu and select disabled from it. This disables the services' autostart
Click the stop button afterwards to stop the running process. This stops the service for the current session.