I personally really don't care at all for the ridiculous glassy look of Aero in Windows 7; it's ugly to me.
I think the biggest problem with Linux is that many people plainly prefer what they're used to. Additionally, if you're a so called Windows "power user" you have vested more knowledge in the Windows ecosystem - specialized knowledge that is useless in the Linux world. An older person doesn't have this specialized knowledge, computers are all the same to them. THAT'S why it's easier for them to switch. They're used to being n00bs and knowing little about the OS they're using. It really doesn't matter which OS it is.
You're rather rude there. I don't agree with what you said and I can say the same thing about your statement. I know plenty of people my age with Linux experience that don't use it as their primary OS precisely because of the UI. And no, they don't want to waste time on config files with a WM, they did that when they were 16-18. And BTW, I was talking about Windows 8, not 7.
Yes, you may not agree when I say Windows (7) looks butt ugly -- and that was my point. It's all quite subjective.
Linux has a big advantage, though, in that you can quite easily switch between different Desktop Environments and/or Window Managers. Configuring the look and feel of your desktop is just a lot easier. And config-file time wasting is entirely optional, I promise.
I find it ironic that you talk about wasting time on config files. My experience in Windows is that doing anything beyond the 10 tasks Microsoft determined to be common results in hours of clicking through menus, configuration dialogs, and in some cases dealing with the registry editor. Trying to troubleshoot a problem is a nightmare. Trying to set up something unusual is beyond a nightmare.