Sadly I was one of those Gnome users perpetuating those claims of KDE being a Hog. And as the article points out can verify that my perceptual facts about KDE where False and widely inaccurate.
"Just for comparison I installed XFCE 4.10 on the same machine, a desktop known for lightness and speed. While certainly not scientific by any standard, I honestly don't see any difference in performance. KDE is a bit larger in memory, 450 Mb compared to XFCE's 325 Mb. Considering I'm comparing my default KDE desktop with effects turned on and running several Plasma widgets to a bare-bones XFCE, I don't really see those extra megabytes as excessive or "bloated". I could have turned off the effects and killed the widgets to make it a more even comparison memory-wise, but in the end I didn't bother. After an hour using XFCE it was apparent to me there was no difference in speed, only a loss of the usability I've become accustomed to with KDE."
"Today's KDE (4.10.1 as of this writing) is not the same animal it was 6 years ago. It's not the same animal it was just two years ago. No, it's not a lightweight desktop like XFCE. Instead it's a complete computing environment more comparable to Gnome 3 and Unity, or Windows and OS-X for that matter. Today's KDE however has the speed of the lightweight desktops combined with usability and configurability like no other."
I Can attest that it's NOT!
a resource hog as chimes in at around 430-450mb.
Unity & Cinnamon chime in a lot higher than that.
Also found KDE a lot smother,snappier than Unity or Cinnamon. Tho do still Love Cinnamon Mint Desktop
And KDE is a very mature & powerful Desktop Environment with practical features that add to usability and productivity.
Allowing me to getting work done in a easier and more fluid work flow.
Tho do hate the confusing array of that very reconfigurability options.
And some of their default themes,icons and such. But very easy to adjust once you decipher the menu options.
And toned mine down to more like Gnome in that regard and end up with a more like a Super Gnome with features I can use that Gnome doesn't have.