So far :
Test Dojo lags for ~5-6 sec. first time you enter before load all the players in. And there was only like 18 players there...
+ Chests show loot almost immediately. On live they can took some time thinking about what loot to generate.
- Some strange micro-freezes while roaming around the Marketplace that I've never seen on Live.
(server 42 at r1 lx367 ly1649 i4 ox142.15 oy35.51 oz137.20. Game timestamp 428272.140.)
Otherwise, there are no differences from Live. At least for now.
Aaaaaaand the most noticeable "same as it is on Live" thing was DDO hangs up for around 6-8 second after I hit the "Finish" button in the "level up" dialogue.

I know, I know, it's not the worst kind of lag but where are the differences ?
Continuing testing.