I use ePO4.6.1 (Build 1192)
That article mentions IE8, what browser are you using?
I am using latest chrome and it shows me how many items are in every folder and when selecting how many i have selected out of the total.
I am also using IE9 in compatibility mode and that also shows the count.
also using 4.6.1
I was using IE8.
In my Company I can use only FF and IE so I migrate to higher version and it helped me.