I'm not sure you and I are looking at the same post then, because the one being quoted initially was specifically talking about leveling speed, the amount of xp needed to level, how long a typical PotD run took and how much xp each run was giving. Not about PotD in general.
Here's the quote:
The leveling speed is also pretty bad. I'm at 57 and I need 2,995,200 experience to level to 58. they want us to go out in the world and do fates, but a fate my level gives 47,520. that's a fraction of what I need. I'd have to do over 60 fates to level that one time. Then you have Palace of the Dead which people swear up and down is the fastest way to level and it gives me a half a level's worth of experience regardless of how far into it I go and a run takes about 20 minutes.