Thats funny to me, because gnome was atleast as laggy for me ootb. But to be honest, both are rather useable once you make a few changes.
@unix121 You can see from the screen there that its using just about 900MB, which is with it pretty paired down , but what you dont see is my 12 tabs (some with youtube) open in inox.
I used to also look down my nose at KDE, but I have been running this desktop for a few months now, and dont feel it is bloated at all - the one thing I cant quite catch up to an XFCE or OB setup with is basic login speed. It simply takes a few extra seconds to get to the desktop.
Again though, I made a point of ripping out everything I found a hinderance or just superfluous.
That means all akonadi and PIM is gone, and as stated above, the same for whatever else I could get my hands on, like animations, effects, tray items, etc. And really, most of that is just 15 minutes of clicks.
If we were to compare using it is at comes initially, I wouldnt have used it for more than 5 minutes, like gnome.