1. Ubuntu is not targeting Windows users more than any other desktop operating system does. Ubuntu tries to create a really great desktop in a world in which the overwhelming majority of desktops run windows. If Ubuntu is converting users of existing operating systems (as opposed to gaining users who have never used personal computers before) then most of them are likely to be users of Windows. The same is true for Fedora and any other desktop operating system.
2. It doesn't matter what distro you're running. It's great that you experiment with different distros and I definitely think the GNU/Linux community benefits from this diversity, but it doesn't really matter in large scale. Most computer users don't choose which operating system to use - they get it with their computer.
I'm worried what might happen if this continues for another 5 years http://www.google.com/trends?q=Fedora+Desktop,+Ubuntu+Deskto...
Just for clarification though: My point isn't that Ubuntu is related to Windows, my point is that it seems Ubuntu is specifically targeting ex-Windows users as prospective clients, and that this fact could explain some of its recent behavior.
And no, I dont think it matters which desktop I'm running, but I do think it matters that the Linux desktop community stay a deverse field, and if the trends we are seeing continue for a few more years that may no longer be the case.