Then the review on TiPb is wrong as that is where I got my info. Go to the link and search for 'The multitasking dock also has a few other features'. The sentence that follows explains that you can force quite an application from the multi tasking dock.
You are wrong. When you long press over a app in that bottom tray you can remove it yes but that is simply to get rid of one more icon. This is because technically none of them are fully running. Certain API's may be running such as audio, GPS, etc... but those apps are essentially frozen and that gives you the ability to resume instantly where you left off.