For anyone wanting to try out Ubuntu or a few other Lunix desktops, try this.
http://wubi-installer.org/
It allows you to install and use Ubuntu or a few other desktops with out any real worries or effecting your current windows installation. It just installs like any other Windows based application and can be easily uninstalled from your Windows control panel uninstaller.
As for the creator of this post, about 95% of what you said or claim is false.
Linux does have professional support
The command line isn't needed to use it anymore really. You can install uninstall and update from windows and menus just like Windows. There is and has been for a little while now a software database that you can browse from the main menu, and simply install any of the hundreds of apps right from there for free.
As for a manual, the internet is your best friend for this. Just goto google and type in what you want to know. It's amazing what a search engine can find if you use them.
The message forums are huge, and there is a ton of people there 24/7 looking for answers or looking to help at no cost other then time. I think the reason for the forums being so big is, once you figure out where everything is, it's easier for you to locate the exact information you are looking for. Other forums I have visited have only a few categories, and people tend to post everything in to one or two of them. This can make it much harder and take more time to find answers to what it is you need.
And as for working right out of the box.... Windows has never just worked completely perfect for me right out of the box. I've had to update drivers for devices and hardware it didn't recognize and confiugure setting and so on. If I ever installed a OS and it " Just Worked" right out of the box and freshly installed, I'd slap a Nun.
While Windows 7 is a vast improvement over Vista, it still isn't perfect. I'll be the first to admit, I like it a lot and Microsoft has come a long way.
In the end, people must realize that Linux is a open source project. The people who work hard to provide another option to people other then Windows, do so for free for the most part and because they want to. Where as Microsoft has a army of disgruntle " but paid" people working for them. Maybe not disgruntle, but I bet if I met someone who worked there and asked them if they enjoyed the job they wouldn't reply " It's the best thing in the world!".