I agree with everything posted on that site. Except that they didn't say it strongly enough.
I haven't used the Dock since the Public Beta.
Grr yourself.
It gets in the way of things, popping up and getting in the way even when you've got it on auto-hide. It's especially bad in the default position (bottom) where lots of apps have widgets at window-bottom (including the Finder). It's least intrusive when set to smallest size and put on the left-hand side of the screen with auto-hide on. But you know something? You can pass the mouse within shooting range of the hidden dock and it pops up and the little text labels show up to identify what it thinks you were pointing at, so you mouse away and the dock goes away but the stupid little labels stay behind, floating in midair.
If you put all the apps you actually use on the damn thing, it becomes a cluttered, crowded thing. Even at its smallest, it eats up screen real estate.
It's far too akin to the Windows Start Menubar. If I wanted a strip of my screen taken away I'd buy a freakin' PC.
Besides, it attempts to steal Command-Tab for application switching. Another Windows wannabee feature. Command-Tab is owned by FileMaker for switching from one record to the next, or from one layout to the next in layout mode. Unlike the similarly irritating feature added to MacOS 9, you can't unassign the keystroke. Well, actually you can: PullTab, from Unsanity.com, will disable Command-Tab app switching. Or you can simply nuke the Dock.
That's what I do. First copy it to another location, like /Applications/Useless. Then add the new copy of Dock to startup items for each account. Then rm the original Dock from its home in CoreServices. No more Dock! Yay!