Talk to anyone who's a bit more advanced in technology than the average American, and you'll notice that they think something to the effect of "Ubuntu's the only Linux".

Mention Slackware, and they're stumped. I had one guy say "Gesundheit" when I mentioned Gentoo.

So, it's fair to Linux saying Ubuntu's got it over Windows and Mac, and yet unfair to Linux in saying only Ubuntu has these.

Edit: Well, in ways of access, Ubuntu's method is easiest (app store like), but anyone can make a GUI frontend for a distro's package manager.