It's not in my experience. Even then, 20 minutes is definitely not a good day. A good day is like 14~17 minutes. 20~22 minutes is pretty average. Anything more and there were probably some issues like a wipe.
Your standards for group performance are just low. Fractaal and Neverreap 16-20 minutes = great? Back when they were the EX roulette 14-16 minute DF runs were great. 18-20 were pretty average. These days, a great 60 roulette group can clear in ~12 minutes.
I don't really care much for the e-peen measuring and the differences in clear speeds don't matter much but for the sake of community quality, can we stop sugar coating sub-par play to make people feel better about themselves? You don't improve unless you have the proper perspective. If you're bad, you're bad. Nothing wrong with that unless you don't know it or refuse to acknowledge it.
Even the excuse of falling back on PLD. PLD is perfectly fine and is actually better in ways than WAR and DRK. You lose like 200-300 DPS for the entire run which your healer can kind of make up for since you will get 2 HG activations on probably 2 of the largest pulls in the dungeon.
