Well, I'm pretty sure I'm in minority here. After abusing tabs for a long time I decided to switch back to windows and I must say I'm very happy. Now when I Command-Tab in Safari I get a new window. These windows pile on the desktop, so eventually I must do something about them, either read, bookmark, when it's something I want to read soon I just drag the page icon to the desktop. And I think that's better for me personally than having hundreds of tabs open. Usually I'll go clicking and filling the desktop and at some point, start to read and close the accumulated windows.

But I try to avoid web applications for mail, rss and anything I can find a decent desktop app, so maybe my way of dealing with windows wouldn't apply to someone who wants to check gmail all day.