^I don't think it's the steering rack. Otherwise, the fluid would've drained reasonable faster. Sorry, OP. I don't mean to thread jack.
The fluid is currently at "Min Cold" and "Min Hot" in respective temperature. The color is black, so, I'm sure it's due for a flush.
The only thing that concerns me is that, after wiping the P/S pump the best I can without removing or loosening anything around it, I can see traces of fluid from the area that I pointed with the green arrow below:
(Pic thanks to Milosch from iwsti.com)
I looked at other forum and found a P/S DIY thread. The guy opened the pump apart and you can see there are more o-rings inside the pump:
(Pic thanks to maxxell from iwsti.com)
Interestingly, I do not see any fluid around the inlet where the "usual suspect" o-ring is located...my steering is still working fine and I don't notice any noise when I turn the wheel from lock to lock. So, it's not exactly a high priority thing, but, it concerns me every time I opened the hood/bonnet...