Do they test with end users thoroughly, like Microsoft and Apple did back in the 80's and 90's?
The difference perhaps is that OpenUsability didn't limit itself to working only on KDE (and also helped out, e.g. LibreOffice), that's why it somehow didn't get booked as a KDE thing and didn't become a similar anecdote people cite now.
Gnome 3 is really like KDE 4, too much messing around for the sake of it.
But another thing I really like about KDE is that there's not a giant behind it like redhat, they're free from commercial motives to make their own choices.