The majority of people breezing through current-delve are doing so because they're effectively level 120. The gear is that good. Groups on my server that couldn't kill 3/5 in morimar are regularly killing Tojil now.

Not just because of weapon skill's translation to damage (in the case of monk), but because of the enormous acc/att bonus, people are doing pretty well even before bard songs. With Bur'menkah alone, my pld can do 2.5-3k WS on fodder in delve, and I never get bard buffs. Before Burm, I was lucky to clear 1k. I didn't suddenly become more amazing, the gear's level jacked me up.