I say that as a windows user and fan (I have a mac, but it's far from my favorite machine).
I also don't feel that mac is any better at managing two windows than Windows.
Microsoft has tried to improve the side-by-side window set-up with their hot spots, but I feel it is a fairly weak implementation, and even though they advertised the feature heavily in Windows 7, I doubt many people use it regularly.
I don't want to start an OS flamewar though, so I'm going to restate my guess as:
I'm guessing most of the wide screen "haters" are people who are used to the "one maximized app at the time" workflow.
I use Windows and OS X on most days of the week, and Windows has never been that well suited for wide screen use, whereas OS X's window management makes it much easier to put screens side by side. I'm often doing this, and it's one of the biggest reasons I'm more productive on OS X. The idea that an app would take up my entire screen, unless it was something like a video editing app, is crazy to me.
A widescreen laptop monitor allows me to copy and paste data from an email into a spreadsheet for instance. Doing that on a 3:2 monitor would be maddening. I agree that for single window use, 3:2 is better for many things, but we don't really like in a single window model anymore.
Works fine in Windows, I use it all the time.
If only window management and multi screen support were as good as the one on windows - it would pretty much be a perfect classic desktop environment.
I use both Windows 7 and OSX everyday. Windows 7's window management is so much better that, it makes me realize how much time I lose managing windows on OSX. The only logical explanation I can come up is that you don't know about snapping windows on Windows 7. Dragging a window to the left or right side of the screen (or with keyboard: Win+Left/Right) will tile it to that part of the screen.
I'd rather have a built-in unix shell (OSX) and install an aero-snap-alike than deal with Windows+putty+cygwin+...
That is to say, all OS suck; and we should not compare dick sizes, as we would all lose.