I recently bought this desk on Leviation for 250K. I leveled my thief to 15, subbed it and headed to test it out on Tabor Beaks as did the last poster. I too had the same drop rate 1/6.
I then zoned and tried it out on the wasps and noticed I was getting quite a few double drops.
It's way too early to determine if this desk works or not. I also bought it for the Synthesis Success Rate Up potential. The way I look at it is its a Level 96 Goldsmithing Item one would think it would have to do something!