It's not 1990 anymore. All operating systems manufacturers need to understand that the vast majority of users have used Windows and are used to Windows' UI conventions. At the very least, one should offer a way for the Windows user to discover what the new conventions are, rather than having to Google and find websites that other people have made when they made the same transition.
What makes this worse is that every windowing system appears to use different terminology for its UI widgets and behaviors. Sticking to a standard terminology (even if it's Windows' terminology) would make things much easier for a convert to figure out how make their machine do what they need it to do.