Heard this may be related to how much junk you have in your property(s), regardless of where you logout. Do you have multiple houses loaded with objects? Do you need a visit from Marie Kondo?
Yeah, when I heard that I tested it and moved all my real estate house inventory to another character and everything in his bank when into an alts house's so nothing was left under his "output files" - it didn't change loading times at all. I was pretty ticked at the devs who tired to put this over on the players.
Someone on another server had some fantastic creative housing that I wanted to go look at so I created a level 1 to go to that server. Low and behold the loading time was just as slow for him (with his 4 items and no house or anything at all) and actually was a little slower. And then I was ticked at myself since I could have saved myself all that bother of moving all those items and just made the level 1 to test that theory with originally.
And this longer loading time is just since the last patch so unless all of us loaded up our houses since then that isn't the reason and they will need to mix up another gallon of kool aid.
However they have introduced the Home Depot on beta so I wonder if its what THEY have loaded that slows us down.