The stats don't tell the whole story. For one thing, as the post's author notes:
Not all Ubuntu users have popularity-contest enabled. It's disabled by default and most Ubuntu users have likely never heard of it. So this will not show a true picture of DE usage on Ubuntu. Also the results may not be 100% accurate.
The author also mentions other factors that should be considered when looking at the data; read the entire article, and also check out the comments that follow.
In any case, here's the table that appears at that web page:
|DE||Package Name||Total Users||Recent Users (used in last 30 days)|
|Classic Gnome||gnome-panel||1527309 (59.96%)||62875 (28.24%)|
|Unity||unity||397130 (15.59%)||71106 (31.94%)|
|KDE||kdesktop||237579 (9.32%)||50369 (22.62%)|
|XFCE||xfce4-panel||238688 (9.37%)||10165 (4.56%)|
|Gnome Shell||gnome-shell||106107 (4.16%)||24626 (11.06%)|
|LXDE||lxde-common||29589 (1.16%)||1375 (0.61%)|
|E17||e17||10696 (0.41%)||2076 (0.93%)|