The first boss in UP takes 30 seconds to begin. Things like CoS and ToC 5 man had such long wait times that it was reasonable to add an option to remove them. That's just going overboard. What next, have them shorten the hallways because it takes too long to run down them?

As far as I can recall, here are the changes from Vanilla->BC->WotLK that they've added to speed up dungeon runs:

Less maze-like entrances to dungeons (before you even get in, that is - ST, BRD, even WC were nuts)
Less multi-level, maze like dungeons
Less trash, smaller packs,
Massive boost to AoE tanking and DPS (maybe unintentionally - I don't know if they genuinely meant to kill off CC)
Summoning stones with level restrictions
Quick exits or portals out near the end boss
Summoning stones without level restrictions
Random dungeon finder with insta-ports in and out
Shortened time between waves in VH
Skippable dialogue sequences for non-first time players


I think a short pause here and then is bearable, considering how far we've come. I think at a certain point, you might as well just put a piñata at the portal and call it a day.