This is an average, everyday DD queue for a random dungeon on PC EU (queued at prime time, Saturday 8pm):

My suggestion: Add a function to see how many Healers/Tanks/DDs are in queue and display your position. That way, if you queue up and see that there are 5000 DDs, 0 Tanks and 3 Healers, DDs wouldn't bother waiting for nothing.
But of course
after fixing the group finder itself. You know, the instant auto-disbands that give you a penalty after you wait for hours.
Edited by Meld777 on April 15, 2017 8:30PM Maelstrom Arena Champion | Undaunted | Fighters Guild Victor
Level 50 Magicka NB | CP160+
nAA | vCoH1 HM | nSO | nCoA2 | nDSA | nMA | vVoM
PC EU