I tried to follow, I really did.
Based on the title, no, the speed at which leveling occurs is actually pretty decent.
Without saving up rested, just leveling with normal xp, you can finish all 3 zones of your faction's continent and get the oppo continent by time you hit 120.
The amount of quests are just as many, if not greater, than past expansions.
The time it takes to do them is about the same as Legion 7.3 (when the scaling outdoor mobs thing became a thing).
Maybe if you skip all quest text or use addons to auto-turn in for you or something you can speed it up, or if you have a group of people you can blitz levels out rather quickly doing group stuff, but neither of these are new.
Leveling content was paced well.
Maybe it's because their way of doing quests has streamlined over the last few xpacs that it feels fast?
There's a natural flow to zones, where you start in one area and work your way to the next as opposed to just bouncing all around like a madman?
I dunno, I didn't feel faster or slower than previous launch leveling.