currently having linux mint kde installed and i am surprised how fast it is so far. i have been away from kde since years and cant remember it being that fast.
anyone knows how i can add quick-starters in the bottom taskbar (marked red in the screenshot)? sure it must be there but i have just not seen it right?
Yea KDE's improved a lot since the initial 4.0 release. It's still fairly heavy compared to the lightweights so it'll have problems on old hardware, but if your machine is even remotely up to snuff it's a great desktop.. don't much care for the lightweights with little functionality.
As far as the icons on the taskbar go, here's a copypaste from the KDE site. One is drag and drop, one is adding widgets.